diff --git a/.travis.yml b/.travis.yml
index bd5ee5d53..5c7761a25 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -50,20 +50,6 @@ matrix:
       env: VERSION=3.5 VARIANT=alpine3.9
     - os: linux
       env: VERSION=3.5 VARIANT=alpine3.8
-    - os: linux
-      env: VERSION=3.4 VARIANT=stretch
-    - os: linux
-      env: VERSION=3.4 VARIANT=stretch/slim
-    - os: linux
-      env: VERSION=3.4 VARIANT=jessie
-    - os: linux
-      env: VERSION=3.4 VARIANT=jessie/slim
-    - os: linux
-      env: VERSION=3.4 VARIANT=wheezy
-    - os: linux
-      env: VERSION=3.4 VARIANT=alpine3.9
-    - os: linux
-      env: VERSION=3.4 VARIANT=alpine3.8
     - os: windows
       dist: 1803-containers
       env: VERSION=2.7 VARIANT=windows/windowsservercore-1803
diff --git a/3.4/alpine3.8/Dockerfile b/3.4/alpine3.8/Dockerfile
deleted file mode 100644
index 7241c75ba..000000000
--- a/3.4/alpine3.8/Dockerfile
+++ /dev/null
@@ -1,126 +0,0 @@
-#
-# NOTE: THIS DOCKERFILE IS GENERATED VIA "update.sh"
-#
-# PLEASE DO NOT EDIT IT DIRECTLY.
-#
-
-FROM alpine:3.8
-
-# ensure local python is preferred over distribution python
-ENV PATH /usr/local/bin:$PATH
-
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
-# install ca-certificates so that HTTPS works consistently
-# other runtime dependencies for Python are installed later
-RUN apk add --no-cache ca-certificates
-
-ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
-ENV PYTHON_VERSION 3.4.10
-
-RUN set -ex \
-	&& apk add --no-cache --virtual .fetch-deps \
-		gnupg \
-		tar \
-		xz \
-	\
-	&& wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" \
-	&& wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY" \
-	&& gpg --batch --verify python.tar.xz.asc python.tar.xz \
-	&& { command -v gpgconf > /dev/null && gpgconf --kill all || :; } \
-	&& rm -rf "$GNUPGHOME" python.tar.xz.asc \
-	&& mkdir -p /usr/src/python \
-	&& tar -xJC /usr/src/python --strip-components=1 -f python.tar.xz \
-	&& rm python.tar.xz \
-	\
-	&& apk add --no-cache --virtual .build-deps  \
-		bzip2-dev \
-		coreutils \
-		dpkg-dev dpkg \
-		expat-dev \
-		findutils \
-		gcc \
-		gdbm-dev \
-		libc-dev \
-		libffi-dev \
-		linux-headers \
-		make \
-		ncurses-dev \
-		libressl-dev \
-		pax-utils \
-		readline-dev \
-		sqlite-dev \
-		tcl-dev \
-		tk \
-		tk-dev \
-		xz-dev \
-		zlib-dev \
-# add build deps before removing fetch deps in case there's overlap
-	&& apk del .fetch-deps \
-	\
-	&& cd /usr/src/python \
-	&& gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-	&& ./configure \
-		--build="$gnuArch" \
-		--enable-loadable-sqlite-extensions \
-		--enable-shared \
-		--with-system-expat \
-		--with-system-ffi \
-		--without-ensurepip \
-	&& make -j "$(nproc)" \
-# set thread stack size to 1MB so we don't segfault before we hit sys.getrecursionlimit()
-# https://github.com/alpinelinux/aports/commit/2026e1259422d4e0cf92391ca2d3844356c649d0
-		EXTRA_CFLAGS="-DTHREAD_STACK_SIZE=0x100000" \
-	&& make install \
-	\
-	&& find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec scanelf --needed --nobanner --format '%n#p' '{}' ';' \
-		| tr ',' '\n' \
-		| sort -u \
-		| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
-		| xargs -rt apk add --no-cache --virtual .python-rundeps \
-	&& apk del .build-deps \
-	\
-	&& find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' + \
-	&& rm -rf /usr/src/python \
-	\
-	&& python3 --version
-
-# make some useful symlinks that are expected to exist
-RUN cd /usr/local/bin \
-	&& ln -s idle3 idle \
-	&& ln -s pydoc3 pydoc \
-	&& ln -s python3 python \
-	&& ln -s python3-config python-config
-
-# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
-ENV PYTHON_PIP_VERSION 19.0.3
-
-RUN set -ex; \
-	\
-	wget -O get-pip.py 'https://bootstrap.pypa.io/get-pip.py'; \
-	\
-	python get-pip.py \
-		--disable-pip-version-check \
-		--no-cache-dir \
-		"pip==$PYTHON_PIP_VERSION" \
-	; \
-	pip --version; \
-	\
-	find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' +; \
-	rm -f get-pip.py
-
-CMD ["python3"]
diff --git a/3.4/alpine3.9/Dockerfile b/3.4/alpine3.9/Dockerfile
deleted file mode 100644
index b991788fc..000000000
--- a/3.4/alpine3.9/Dockerfile
+++ /dev/null
@@ -1,126 +0,0 @@
-#
-# NOTE: THIS DOCKERFILE IS GENERATED VIA "update.sh"
-#
-# PLEASE DO NOT EDIT IT DIRECTLY.
-#
-
-FROM alpine:3.9
-
-# ensure local python is preferred over distribution python
-ENV PATH /usr/local/bin:$PATH
-
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
-# install ca-certificates so that HTTPS works consistently
-# other runtime dependencies for Python are installed later
-RUN apk add --no-cache ca-certificates
-
-ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
-ENV PYTHON_VERSION 3.4.10
-
-RUN set -ex \
-	&& apk add --no-cache --virtual .fetch-deps \
-		gnupg \
-		tar \
-		xz \
-	\
-	&& wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" \
-	&& wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY" \
-	&& gpg --batch --verify python.tar.xz.asc python.tar.xz \
-	&& { command -v gpgconf > /dev/null && gpgconf --kill all || :; } \
-	&& rm -rf "$GNUPGHOME" python.tar.xz.asc \
-	&& mkdir -p /usr/src/python \
-	&& tar -xJC /usr/src/python --strip-components=1 -f python.tar.xz \
-	&& rm python.tar.xz \
-	\
-	&& apk add --no-cache --virtual .build-deps  \
-		bzip2-dev \
-		coreutils \
-		dpkg-dev dpkg \
-		expat-dev \
-		findutils \
-		gcc \
-		gdbm-dev \
-		libc-dev \
-		libffi-dev \
-		linux-headers \
-		make \
-		ncurses-dev \
-		libressl-dev \
-		pax-utils \
-		readline-dev \
-		sqlite-dev \
-		tcl-dev \
-		tk \
-		tk-dev \
-		xz-dev \
-		zlib-dev \
-# add build deps before removing fetch deps in case there's overlap
-	&& apk del .fetch-deps \
-	\
-	&& cd /usr/src/python \
-	&& gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-	&& ./configure \
-		--build="$gnuArch" \
-		--enable-loadable-sqlite-extensions \
-		--enable-shared \
-		--with-system-expat \
-		--with-system-ffi \
-		--without-ensurepip \
-	&& make -j "$(nproc)" \
-# set thread stack size to 1MB so we don't segfault before we hit sys.getrecursionlimit()
-# https://github.com/alpinelinux/aports/commit/2026e1259422d4e0cf92391ca2d3844356c649d0
-		EXTRA_CFLAGS="-DTHREAD_STACK_SIZE=0x100000" \
-	&& make install \
-	\
-	&& find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec scanelf --needed --nobanner --format '%n#p' '{}' ';' \
-		| tr ',' '\n' \
-		| sort -u \
-		| awk 'system("[ -e /usr/local/lib/" $1 " ]") == 0 { next } { print "so:" $1 }' \
-		| xargs -rt apk add --no-cache --virtual .python-rundeps \
-	&& apk del .build-deps \
-	\
-	&& find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' + \
-	&& rm -rf /usr/src/python \
-	\
-	&& python3 --version
-
-# make some useful symlinks that are expected to exist
-RUN cd /usr/local/bin \
-	&& ln -s idle3 idle \
-	&& ln -s pydoc3 pydoc \
-	&& ln -s python3 python \
-	&& ln -s python3-config python-config
-
-# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
-ENV PYTHON_PIP_VERSION 19.0.3
-
-RUN set -ex; \
-	\
-	wget -O get-pip.py 'https://bootstrap.pypa.io/get-pip.py'; \
-	\
-	python get-pip.py \
-		--disable-pip-version-check \
-		--no-cache-dir \
-		"pip==$PYTHON_PIP_VERSION" \
-	; \
-	pip --version; \
-	\
-	find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' +; \
-	rm -f get-pip.py
-
-CMD ["python3"]
diff --git a/3.4/jessie/Dockerfile b/3.4/jessie/Dockerfile
deleted file mode 100644
index c5464da7c..000000000
--- a/3.4/jessie/Dockerfile
+++ /dev/null
@@ -1,89 +0,0 @@
-#
-# NOTE: THIS DOCKERFILE IS GENERATED VIA "update.sh"
-#
-# PLEASE DO NOT EDIT IT DIRECTLY.
-#
-
-FROM buildpack-deps:jessie
-
-# ensure local python is preferred over distribution python
-ENV PATH /usr/local/bin:$PATH
-
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
-# extra dependencies (over what buildpack-deps already includes)
-RUN apt-get update && apt-get install -y --no-install-recommends \
-		tk-dev \
-	&& rm -rf /var/lib/apt/lists/*
-
-ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
-ENV PYTHON_VERSION 3.4.10
-
-RUN set -ex \
-	\
-	&& wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" \
-	&& wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY" \
-	&& gpg --batch --verify python.tar.xz.asc python.tar.xz \
-	&& { command -v gpgconf > /dev/null && gpgconf --kill all || :; } \
-	&& rm -rf "$GNUPGHOME" python.tar.xz.asc \
-	&& mkdir -p /usr/src/python \
-	&& tar -xJC /usr/src/python --strip-components=1 -f python.tar.xz \
-	&& rm python.tar.xz \
-	\
-	&& cd /usr/src/python \
-	&& gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-	&& ./configure \
-		--build="$gnuArch" \
-		--enable-loadable-sqlite-extensions \
-		--enable-shared \
-		--with-system-expat \
-		--with-system-ffi \
-		--without-ensurepip \
-	&& make -j "$(nproc)" \
-	&& make install \
-	&& ldconfig \
-	\
-	&& find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' + \
-	&& rm -rf /usr/src/python \
-	\
-	&& python3 --version
-
-# make some useful symlinks that are expected to exist
-RUN cd /usr/local/bin \
-	&& ln -s idle3 idle \
-	&& ln -s pydoc3 pydoc \
-	&& ln -s python3 python \
-	&& ln -s python3-config python-config
-
-# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
-ENV PYTHON_PIP_VERSION 19.0.3
-
-RUN set -ex; \
-	\
-	wget -O get-pip.py 'https://bootstrap.pypa.io/get-pip.py'; \
-	\
-	python get-pip.py \
-		--disable-pip-version-check \
-		--no-cache-dir \
-		"pip==$PYTHON_PIP_VERSION" \
-	; \
-	pip --version; \
-	\
-	find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' +; \
-	rm -f get-pip.py
-
-CMD ["python3"]
diff --git a/3.4/jessie/slim/Dockerfile b/3.4/jessie/slim/Dockerfile
deleted file mode 100644
index d95988609..000000000
--- a/3.4/jessie/slim/Dockerfile
+++ /dev/null
@@ -1,133 +0,0 @@
-#
-# NOTE: THIS DOCKERFILE IS GENERATED VIA "update.sh"
-#
-# PLEASE DO NOT EDIT IT DIRECTLY.
-#
-
-FROM debian:jessie-slim
-
-# ensure local python is preferred over distribution python
-ENV PATH /usr/local/bin:$PATH
-
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
-# runtime dependencies
-RUN apt-get update && apt-get install -y --no-install-recommends \
-		ca-certificates \
-		netbase \
-	&& rm -rf /var/lib/apt/lists/*
-
-ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
-ENV PYTHON_VERSION 3.4.10
-
-RUN set -ex \
-	\
-	&& savedAptMark="$(apt-mark showmanual)" \
-	&& apt-get update && apt-get install -y --no-install-recommends \
-		dpkg-dev \
-		gcc \
-		libbz2-dev \
-		libc6-dev \
-		libexpat1-dev \
-		libffi-dev \
-		libgdbm-dev \
-		liblzma-dev \
-		libncursesw5-dev \
-		libreadline-dev \
-		libsqlite3-dev \
-		libssl-dev \
-		make \
-		tk-dev \
-		wget \
-		xz-utils \
-		zlib1g-dev \
-# as of Stretch, "gpg" is no longer included by default
-		$(command -v gpg > /dev/null || echo 'gnupg dirmngr') \
-	\
-	&& wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" \
-	&& wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY" \
-	&& gpg --batch --verify python.tar.xz.asc python.tar.xz \
-	&& { command -v gpgconf > /dev/null && gpgconf --kill all || :; } \
-	&& rm -rf "$GNUPGHOME" python.tar.xz.asc \
-	&& mkdir -p /usr/src/python \
-	&& tar -xJC /usr/src/python --strip-components=1 -f python.tar.xz \
-	&& rm python.tar.xz \
-	\
-	&& cd /usr/src/python \
-	&& gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-	&& ./configure \
-		--build="$gnuArch" \
-		--enable-loadable-sqlite-extensions \
-		--enable-shared \
-		--with-system-expat \
-		--with-system-ffi \
-		--without-ensurepip \
-	&& make -j "$(nproc)" \
-	&& make install \
-	&& ldconfig \
-	\
-	&& apt-mark auto '.*' > /dev/null \
-	&& apt-mark manual $savedAptMark \
-	&& find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec ldd '{}' ';' \
-		| awk '/=>/ { print $(NF-1) }' \
-		| sort -u \
-		| xargs -r dpkg-query --search \
-		| cut -d: -f1 \
-		| sort -u \
-		| xargs -r apt-mark manual \
-	&& apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-	&& rm -rf /var/lib/apt/lists/* \
-	\
-	&& find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' + \
-	&& rm -rf /usr/src/python \
-	\
-	&& python3 --version
-
-# make some useful symlinks that are expected to exist
-RUN cd /usr/local/bin \
-	&& ln -s idle3 idle \
-	&& ln -s pydoc3 pydoc \
-	&& ln -s python3 python \
-	&& ln -s python3-config python-config
-
-# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
-ENV PYTHON_PIP_VERSION 19.0.3
-
-RUN set -ex; \
-	\
-	savedAptMark="$(apt-mark showmanual)"; \
-	apt-get update; \
-	apt-get install -y --no-install-recommends wget; \
-	\
-	wget -O get-pip.py 'https://bootstrap.pypa.io/get-pip.py'; \
-	\
-	apt-mark auto '.*' > /dev/null; \
-	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
-	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
-	rm -rf /var/lib/apt/lists/*; \
-	\
-	python get-pip.py \
-		--disable-pip-version-check \
-		--no-cache-dir \
-		"pip==$PYTHON_PIP_VERSION" \
-	; \
-	pip --version; \
-	\
-	find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' +; \
-	rm -f get-pip.py
-
-CMD ["python3"]
diff --git a/3.4/stretch/Dockerfile b/3.4/stretch/Dockerfile
deleted file mode 100644
index a41a32ea2..000000000
--- a/3.4/stretch/Dockerfile
+++ /dev/null
@@ -1,91 +0,0 @@
-#
-# NOTE: THIS DOCKERFILE IS GENERATED VIA "update.sh"
-#
-# PLEASE DO NOT EDIT IT DIRECTLY.
-#
-
-FROM buildpack-deps:stretch
-
-# ensure local python is preferred over distribution python
-ENV PATH /usr/local/bin:$PATH
-
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
-# extra dependencies (over what buildpack-deps already includes)
-RUN apt-get update && apt-get install -y --no-install-recommends \
-# Python 3.4 on Stretch+ needs to use an older version of "libssl1.0-dev" (these lines both get removed for every other combination)
-		libssl1.0-dev \
-		tk-dev \
-	&& rm -rf /var/lib/apt/lists/*
-
-ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
-ENV PYTHON_VERSION 3.4.10
-
-RUN set -ex \
-	\
-	&& wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" \
-	&& wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY" \
-	&& gpg --batch --verify python.tar.xz.asc python.tar.xz \
-	&& { command -v gpgconf > /dev/null && gpgconf --kill all || :; } \
-	&& rm -rf "$GNUPGHOME" python.tar.xz.asc \
-	&& mkdir -p /usr/src/python \
-	&& tar -xJC /usr/src/python --strip-components=1 -f python.tar.xz \
-	&& rm python.tar.xz \
-	\
-	&& cd /usr/src/python \
-	&& gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-	&& ./configure \
-		--build="$gnuArch" \
-		--enable-loadable-sqlite-extensions \
-		--enable-shared \
-		--with-system-expat \
-		--with-system-ffi \
-		--without-ensurepip \
-	&& make -j "$(nproc)" \
-	&& make install \
-	&& ldconfig \
-	\
-	&& find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' + \
-	&& rm -rf /usr/src/python \
-	\
-	&& python3 --version
-
-# make some useful symlinks that are expected to exist
-RUN cd /usr/local/bin \
-	&& ln -s idle3 idle \
-	&& ln -s pydoc3 pydoc \
-	&& ln -s python3 python \
-	&& ln -s python3-config python-config
-
-# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
-ENV PYTHON_PIP_VERSION 19.0.3
-
-RUN set -ex; \
-	\
-	wget -O get-pip.py 'https://bootstrap.pypa.io/get-pip.py'; \
-	\
-	python get-pip.py \
-		--disable-pip-version-check \
-		--no-cache-dir \
-		"pip==$PYTHON_PIP_VERSION" \
-	; \
-	pip --version; \
-	\
-	find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' +; \
-	rm -f get-pip.py
-
-CMD ["python3"]
diff --git a/3.4/stretch/slim/Dockerfile b/3.4/stretch/slim/Dockerfile
deleted file mode 100644
index 54c67d807..000000000
--- a/3.4/stretch/slim/Dockerfile
+++ /dev/null
@@ -1,133 +0,0 @@
-#
-# NOTE: THIS DOCKERFILE IS GENERATED VIA "update.sh"
-#
-# PLEASE DO NOT EDIT IT DIRECTLY.
-#
-
-FROM debian:stretch-slim
-
-# ensure local python is preferred over distribution python
-ENV PATH /usr/local/bin:$PATH
-
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
-# runtime dependencies
-RUN apt-get update && apt-get install -y --no-install-recommends \
-		ca-certificates \
-		netbase \
-	&& rm -rf /var/lib/apt/lists/*
-
-ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
-ENV PYTHON_VERSION 3.4.10
-
-RUN set -ex \
-	\
-	&& savedAptMark="$(apt-mark showmanual)" \
-	&& apt-get update && apt-get install -y --no-install-recommends \
-		dpkg-dev \
-		gcc \
-		libbz2-dev \
-		libc6-dev \
-		libexpat1-dev \
-		libffi-dev \
-		libgdbm-dev \
-		liblzma-dev \
-		libncursesw5-dev \
-		libreadline-dev \
-		libsqlite3-dev \
-		libssl1.0-dev \
-		make \
-		tk-dev \
-		wget \
-		xz-utils \
-		zlib1g-dev \
-# as of Stretch, "gpg" is no longer included by default
-		$(command -v gpg > /dev/null || echo 'gnupg dirmngr') \
-	\
-	&& wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" \
-	&& wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY" \
-	&& gpg --batch --verify python.tar.xz.asc python.tar.xz \
-	&& { command -v gpgconf > /dev/null && gpgconf --kill all || :; } \
-	&& rm -rf "$GNUPGHOME" python.tar.xz.asc \
-	&& mkdir -p /usr/src/python \
-	&& tar -xJC /usr/src/python --strip-components=1 -f python.tar.xz \
-	&& rm python.tar.xz \
-	\
-	&& cd /usr/src/python \
-	&& gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
-	&& ./configure \
-		--build="$gnuArch" \
-		--enable-loadable-sqlite-extensions \
-		--enable-shared \
-		--with-system-expat \
-		--with-system-ffi \
-		--without-ensurepip \
-	&& make -j "$(nproc)" \
-	&& make install \
-	&& ldconfig \
-	\
-	&& apt-mark auto '.*' > /dev/null \
-	&& apt-mark manual $savedAptMark \
-	&& find /usr/local -type f -executable -not \( -name '*tkinter*' \) -exec ldd '{}' ';' \
-		| awk '/=>/ { print $(NF-1) }' \
-		| sort -u \
-		| xargs -r dpkg-query --search \
-		| cut -d: -f1 \
-		| sort -u \
-		| xargs -r apt-mark manual \
-	&& apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false \
-	&& rm -rf /var/lib/apt/lists/* \
-	\
-	&& find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' + \
-	&& rm -rf /usr/src/python \
-	\
-	&& python3 --version
-
-# make some useful symlinks that are expected to exist
-RUN cd /usr/local/bin \
-	&& ln -s idle3 idle \
-	&& ln -s pydoc3 pydoc \
-	&& ln -s python3 python \
-	&& ln -s python3-config python-config
-
-# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
-ENV PYTHON_PIP_VERSION 19.0.3
-
-RUN set -ex; \
-	\
-	savedAptMark="$(apt-mark showmanual)"; \
-	apt-get update; \
-	apt-get install -y --no-install-recommends wget; \
-	\
-	wget -O get-pip.py 'https://bootstrap.pypa.io/get-pip.py'; \
-	\
-	apt-mark auto '.*' > /dev/null; \
-	[ -z "$savedAptMark" ] || apt-mark manual $savedAptMark; \
-	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
-	rm -rf /var/lib/apt/lists/*; \
-	\
-	python get-pip.py \
-		--disable-pip-version-check \
-		--no-cache-dir \
-		"pip==$PYTHON_PIP_VERSION" \
-	; \
-	pip --version; \
-	\
-	find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' +; \
-	rm -f get-pip.py
-
-CMD ["python3"]
diff --git a/3.4/wheezy/Dockerfile b/3.4/wheezy/Dockerfile
deleted file mode 100644
index 9fdfffcd1..000000000
--- a/3.4/wheezy/Dockerfile
+++ /dev/null
@@ -1,89 +0,0 @@
-#
-# NOTE: THIS DOCKERFILE IS GENERATED VIA "update.sh"
-#
-# PLEASE DO NOT EDIT IT DIRECTLY.
-#
-
-FROM buildpack-deps:wheezy
-
-# ensure local python is preferred over distribution python
-ENV PATH /usr/local/bin:$PATH
-
-# http://bugs.python.org/issue19846
-# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
-ENV LANG C.UTF-8
-
-# extra dependencies (over what buildpack-deps already includes)
-RUN apt-get update && apt-get install -y --no-install-recommends \
-		tk-dev \
-	&& rm -rf /var/lib/apt/lists/*
-
-ENV GPG_KEY 97FC712E4C024BBEA48A61ED3A5CA953F73C700D
-ENV PYTHON_VERSION 3.4.10
-
-RUN set -ex \
-	\
-	&& wget -O python.tar.xz "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz" \
-	&& wget -O python.tar.xz.asc "https://www.python.org/ftp/python/${PYTHON_VERSION%%[a-z]*}/Python-$PYTHON_VERSION.tar.xz.asc" \
-	&& export GNUPGHOME="$(mktemp -d)" \
-	&& gpg --batch --keyserver ha.pool.sks-keyservers.net --recv-keys "$GPG_KEY" \
-	&& gpg --batch --verify python.tar.xz.asc python.tar.xz \
-	&& { command -v gpgconf > /dev/null && gpgconf --kill all || :; } \
-	&& rm -rf "$GNUPGHOME" python.tar.xz.asc \
-	&& mkdir -p /usr/src/python \
-	&& tar -xJC /usr/src/python --strip-components=1 -f python.tar.xz \
-	&& rm python.tar.xz \
-	\
-	&& cd /usr/src/python \
-	&& gnuArch="$(dpkg-architecture -qDEB_BUILD_GNU_TYPE)" \
-	&& ./configure \
-		--build="$gnuArch" \
-		--enable-loadable-sqlite-extensions \
-		--enable-shared \
-		--with-system-expat \
-		--with-system-ffi \
-		--without-ensurepip \
-	&& make -j "$(nproc)" \
-	&& make install \
-	&& ldconfig \
-	\
-	&& find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' + \
-	&& rm -rf /usr/src/python \
-	\
-	&& python3 --version
-
-# make some useful symlinks that are expected to exist
-RUN cd /usr/local/bin \
-	&& ln -s idle3 idle \
-	&& ln -s pydoc3 pydoc \
-	&& ln -s python3 python \
-	&& ln -s python3-config python-config
-
-# if this is called "PIP_VERSION", pip explodes with "ValueError: invalid truth value '<VERSION>'"
-ENV PYTHON_PIP_VERSION 19.0.3
-
-RUN set -ex; \
-	\
-	wget -O get-pip.py 'https://bootstrap.pypa.io/get-pip.py'; \
-	\
-	python get-pip.py \
-		--disable-pip-version-check \
-		--no-cache-dir \
-		"pip==$PYTHON_PIP_VERSION" \
-	; \
-	pip --version; \
-	\
-	find /usr/local -depth \
-		\( \
-			\( -type d -a \( -name test -o -name tests \) \) \
-			-o \
-			\( -type f -a \( -name '*.pyc' -o -name '*.pyo' \) \) \
-		\) -exec rm -rf '{}' +; \
-	rm -f get-pip.py
-
-CMD ["python3"]
diff --git a/update.sh b/update.sh
index a21d2feb0..c7e82f879 100755
--- a/update.sh
+++ b/update.sh
@@ -8,10 +8,6 @@ declare -A gpgKeys=(
 	[2.7]='C01E1CAD5EA2C4F0B8E3571504C367C218ADD4FF'
 	# https://www.python.org/dev/peps/pep-0373/#release-manager-and-crew
 
-	# gpg: key F73C700D: public key "Larry Hastings <larry@hastings.org>" imported
-	[3.4]='97FC712E4C024BBEA48A61ED3A5CA953F73C700D'
-	# https://www.python.org/dev/peps/pep-0429/#release-manager-and-crew
-
 	# gpg: key F73C700D: public key "Larry Hastings <larry@hastings.org>" imported
 	[3.5]='97FC712E4C024BBEA48A61ED3A5CA953F73C700D'
 	# https://www.python.org/dev/peps/pep-0478/#release-manager-and-crew
@@ -171,30 +167,19 @@ for version in "${versions[@]}"; do
 
 			# Libraries to build the nis module only available in Alpine 3.7+.
 			# Also require this patch https://bugs.python.org/issue32521 only available in Python 2.7, 3.6+.
-			3.[4-5]*/alpine*)
+			3.5*/alpine*)
 				sed -ri -e '/libnsl-dev/d' -e '/libtirpc-dev/d' "$dir/Dockerfile"
-				;;& # (3.4*/alpine* and 3.5*/alpine* need to match the next blocks too)
-
-			# Alpine 3.9's OpenSSL 1.1.1 is too new for Python 3.4
-			# no OpenSSL 1.0.x package available, so have to switch back to LibreSSL
-			3.4/alpine3.9)
-				sed -ri -e 's/openssl-dev/libressl-dev/g' "$dir/Dockerfile"
-				;;& # (need to match next block too)
+				;;& # (3.5*/alpine* needs to match the next blocks too)
 
 			# https://bugs.python.org/issue11063, https://bugs.python.org/issue20519 (Python 3.7.0+)
 			# A new native _uuid module improves uuid import time and avoids using ctypes.
 			# This requires the development libuuid headers.
-			3.[4-6]*/alpine*)
+			3.[5-6]*/alpine*)
 				sed -ri -e '/util-linux-dev/d' "$dir/Dockerfile"
 				;;
-			3.[4-6]*)
+			3.[5-6]*)
 				sed -ri -e '/uuid-dev/d' "$dir/Dockerfile"
 				;;& # (other Debian variants need to match later blocks)
-
-			3.4/stretch*)
-				# older Python needs older OpenSSL
-				sed -ri -e 's/libssl-dev/libssl1.0-dev/g' "$dir/Dockerfile"
-				;;
 			*/stretch | */jessie | */wheezy)
 				# buildpack-deps already includes libssl-dev
 				sed -ri -e '/libssl-dev/d' "$dir/Dockerfile"