diff --git a/Dockerfile b/Dockerfile
index 6c7ed01..6bae95f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM ruby:2.4-alpine
 LABEL maintainer "masutaka.net@gmail.com"
 
-ENV VERSION=3.1.0
+ENV VERSION=3.2.0
 
 RUN apk add --update --no-cache git && \
     gem install -N github-nippou -v ${VERSION}
diff --git a/Gemfile.lock b/Gemfile.lock
index db1bfe6..665dbe6 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    github-nippou (3.1.0)
+    github-nippou (3.2.0)
       activesupport
       highline
       launchy
diff --git a/lib/github/nippou/version.rb b/lib/github/nippou/version.rb
index e0db650..3ac6209 100644
--- a/lib/github/nippou/version.rb
+++ b/lib/github/nippou/version.rb
@@ -1,5 +1,5 @@
 module Github
   module Nippou
-    VERSION = '3.1.0'
+    VERSION = '3.2.0'
   end
 end