diff --git a/Dockerfile b/Dockerfile
index 5ce48d8..1f6a2bb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM ruby:2.4-alpine
 LABEL maintainer "masutaka.net@gmail.com"
 
-ENV VERSION=3.0.0.beta2
+ENV VERSION=3.0.0
 
 RUN apk add --update --no-cache git && \
     gem install -N github-nippou -v ${VERSION}
diff --git a/Gemfile.lock b/Gemfile.lock
index d0774b8..65bba01 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    github-nippou (3.0.0.beta2)
+    github-nippou (3.0.0)
       activesupport
       highline
       launchy
diff --git a/lib/github/nippou/version.rb b/lib/github/nippou/version.rb
index a58a5bc..250c32b 100644
--- a/lib/github/nippou/version.rb
+++ b/lib/github/nippou/version.rb
@@ -1,5 +1,5 @@
 module Github
   module Nippou
-    VERSION = '3.0.0.beta2'
+    VERSION = '3.0.0'
   end
 end