diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ee1174df..51ecf6e8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -51,7 +51,7 @@ jobs:
         with:
           access_token: ${{ github.token }}
       - name: 'Check out repository'
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: 'Set up JDK ${{ matrix.java }} from jdk.java.net'
         if: ${{ matrix.java == 'EA' }}
         uses: oracle-actions/setup-java@v1
@@ -61,7 +61,7 @@ jobs:
           cache: 'maven'
       - name: 'Set up JDK ${{ matrix.java }}'
         if: ${{ matrix.java != 'EA' }}
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
           java-version: ${{ matrix.java }}
           distribution: 'zulu'
@@ -80,9 +80,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: 'Check out repository'
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
       - name: 'Set up JDK 17'
-        uses: actions/setup-java@v2
+        uses: actions/setup-java@v4
         with:
           java-version: 17
           distribution: 'zulu'
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 3176f73c..cf50d61c 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,14 +12,14 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: write
-    steps:         
+    steps:
       - name: Checkout
-        uses: actions/checkout@v2.4.0
+        uses: actions/checkout@v4
 
       - name: Set up JDK
-        uses: actions/setup-java@v2.5.0
+        uses: actions/setup-java@v4
         with:
-          java-version: 17
+          java-version: 21
           distribution: 'zulu'
           cache: 'maven'
           server-id: sonatype-nexus-staging
@@ -27,7 +27,7 @@ jobs:
           server-password: CI_DEPLOY_PASSWORD
           gpg-private-key: ${{ secrets.GPG_SIGNING_KEY }}
           gpg-passphrase: MAVEN_GPG_PASSPHRASE
-     
+
       - name: Bump Version Number
         run: |
           mvn --no-transfer-progress versions:set versions:commit -DnewVersion="${{ github.event.inputs.version }}"
@@ -40,7 +40,7 @@ jobs:
           git tag "v${{ github.event.inputs.version }}"
           echo "TARGET_COMMITISH=$(git rev-parse HEAD)" >> $GITHUB_ENV
           git remote set-url origin https://${{ github.actor }}:${{ secrets.GITHUB_TOKEN }}@github.com/google/google-java-format.git
-          
+
       - name: Deploy to Sonatype staging
         env:
           CI_DEPLOY_USERNAME: ${{ secrets.CI_DEPLOY_USERNAME }}
@@ -56,12 +56,12 @@ jobs:
       - name: Push tag
         run: |
           git push origin "v${{ github.event.inputs.version }}"
-          
+
       - name: Add Jars to Release Entry
         uses: softprops/action-gh-release@v0.1.14
         with:
           draft: true
-          name: ${{ github.event.input.version }} 
+          name: ${{ github.event.input.version }}
           tag_name: "v${{ github.event.inputs.version }}"
           target_commitish: ${{ env.TARGET_COMMITISH }}
           files: |
diff --git a/core/pom.xml b/core/pom.xml
index d1363fed..fce339af 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -22,7 +22,7 @@
   <parent>
     <groupId>com.google.googlejavaformat</groupId>
     <artifactId>google-java-format-parent</artifactId>
-  <version>HEAD-SNAPSHOT</version>
+  <version>1.19.1</version>
   </parent>
 
   <artifactId>google-java-format</artifactId>
diff --git a/eclipse_plugin/META-INF/MANIFEST.MF b/eclipse_plugin/META-INF/MANIFEST.MF
index 91324539..eca426e1 100644
--- a/eclipse_plugin/META-INF/MANIFEST.MF
+++ b/eclipse_plugin/META-INF/MANIFEST.MF
@@ -3,7 +3,7 @@ Bundle-ManifestVersion: 2
 Bundle-Name: google-java-format
 Bundle-SymbolicName: google-java-format-eclipse-plugin;singleton:=true
 Bundle-Vendor: Google
-Bundle-Version: 1.13.0
+Bundle-Version: 1.19.1
 Bundle-RequiredExecutionEnvironment: JavaSE-11
 Require-Bundle: org.eclipse.jdt.core;bundle-version="3.10.0",
  org.eclipse.jface,
diff --git a/eclipse_plugin/pom.xml b/eclipse_plugin/pom.xml
index 9e6acdac..984e383e 100644
--- a/eclipse_plugin/pom.xml
+++ b/eclipse_plugin/pom.xml
@@ -22,7 +22,7 @@
   <groupId>com.google.googlejavaformat</groupId>
   <artifactId>google-java-format-eclipse-plugin</artifactId>
   <packaging>eclipse-plugin</packaging>
-  <version>1.13.0</version>
+  <version>1.19.1</version>
 
   <name>Google Java Format Plugin for Eclipse 4.5+</name>
 
diff --git a/pom.xml b/pom.xml
index 8b3ca51c..3c67f25b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,7 +23,7 @@
   <groupId>com.google.googlejavaformat</groupId>
   <artifactId>google-java-format-parent</artifactId>
   <packaging>pom</packaging>
-  <version>HEAD-SNAPSHOT</version>
+  <version>1.19.1</version>
 
   <modules>
     <module>core</module>
diff --git a/scripts/google-java-format-diff.py b/scripts/google-java-format-diff.py
index 151ae33d..2c75edac 100755
--- a/scripts/google-java-format-diff.py
+++ b/scripts/google-java-format-diff.py
@@ -1,13 +1,13 @@
 #!/usr/bin/env python3
 #
-#===- google-java-format-diff.py - google-java-format Diff Reformatter -----===#
+# ===- google-java-format-diff.py - google-java-format Diff Reformatter -----===#
 #
 #                     The LLVM Compiler Infrastructure
 #
 # This file is distributed under the University of Illinois Open Source
 # License. See LICENSE.TXT for details.
 #
-#===------------------------------------------------------------------------===#
+# ===------------------------------------------------------------------------===#
 
 """
 google-java-format Diff Reformatter
@@ -75,7 +75,7 @@ def main():
   lines_by_file = {}
 
   for line in sys.stdin:
-    match = re.search('^\+\+\+\ (.*?/){%s}(\S*)' % args.p, line)
+    match = re.search(r'^\+\+\+\ (.*?/){%s}(\S*)' % args.p, line)
     if match:
       filename = match.group(2)
     if filename == None:
@@ -88,7 +88,7 @@ def main():
       if not re.match('^%s$' % args.iregex, filename, re.IGNORECASE):
         continue
 
-    match = re.search('^@@.*\+(\d+)(,(\d+))?', line)
+    match = re.search(r'^@@.*\+(\d+)(,(\d+))?', line)
     if match:
       start_line = int(match.group(1))
       line_count = 1