diff --git a/.travis.yml b/.travis.yml
index 1a955e1..75861ca 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -27,7 +27,7 @@ deploy:
     secure: CpNaj4F3TZvpP1aSJWidh/XexrWODV2sBdObrYU79Gyh9hFl6WLsA3JM9BfVsy9cGb/P/jP6ly4Z0/6qdIzZ5D6FPOB1B7rn5GZ2LAMOypRCA6W2uJbRjUU373Wut0p0OmQcMPto6XJsMlpvOEq+1uAq+LLAnAGEmmYTeskZebs=
   on:
     tags: true
-    condition: '"$TRAVIS_PYTHON_VERSION" = "3.7" || "$TRAVIS_PYTHON_VERSION" = "2.7"'
+    condition: '"$TRAVIS_PYTHON_VERSION" = "3.8" || "$TRAVIS_PYTHON_VERSION" = "2.7"'
   distributions: "sdist bdist_wheel"
 
 matrix:
diff --git a/setup.py b/setup.py
index e2330ab..6637317 100755
--- a/setup.py
+++ b/setup.py
@@ -12,12 +12,12 @@
 
 setup(
   name='fluent-logger',
-  version='0.9.4',
+  version='0.9.5',
   description=desc,
   long_description=open(README).read(),
   package_dir={'fluent': 'fluent'},
   packages=['fluent'],
-  install_requires=['msgpack'],
+  install_requires=['msgpack<1.0.0'],
   author='Kazuki Ohta',
   author_email='kazuki.ohta@gmail.com',
   url='https://github.com/fluent/fluent-logger-python',