diff --git a/.travis.yml b/.travis.yml
index 0e1baeb0..6f03eec7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,8 @@ sudo: false
 
 install:
   - go get golang.org/x/lint/golint
-  - go get github.com/haya14busa/reviewdog/cmd/reviewdog
+  - curl -L -o $HOME/bin/reviewdog https://github.com/haya14busa/reviewdog/releases/download/0.9.11/reviewdog_linux_amd64
+  - chmod a+x $HOME/bin/reviewdog
 
 script:
   - reviewdog -reporter=github-pr-check
diff --git a/linebot/version.go b/linebot/version.go
index 1952403c..675c486a 100644
--- a/linebot/version.go
+++ b/linebot/version.go
@@ -14,4 +14,4 @@
 
 package linebot
 
-const version = "1.0.0"
+const version = "3.0.0"
diff --git a/script/tag.sh b/script/tag.sh
new file mode 100644
index 00000000..57109556
--- /dev/null
+++ b/script/tag.sh
@@ -0,0 +1,70 @@
+# Copyright 2018 LINE Corporation
+#
+# LINE Corporation licenses this file to you under the Apache License,
+# version 2.0 (the "License"); you may not use this file except in compliance
+# with the License. You may obtain a copy of the License at:
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+#
+# Update and commit linebot/version.go and create a new tag.
+#
+# Usage:
+#   bash script/tag.sh v3.0.0
+
+if [ $# -gt 1 ]; then
+  echo "too many arguments" > /dev/stderr
+  echo 'Usage: tag.sh $TAG' > /dev/stderr
+  exit 1
+fi
+
+if [ $# -lt 1 ]; then
+  echo "TAG argument is required" > /dev/stderr
+  echo 'Usage: tag.sh $TAG' > /dev/stderr
+  exit 1
+fi
+
+TAG=$1
+echo "TAG: $TAG"
+VERSION=${TAG#v}
+
+if [ "$TAG" = "$VERSION" ]; then
+  echo "TAG must start with 'v'"
+  exit 1
+fi
+
+echo "cd `dirname $0`/.."
+cd `dirname $0`/..
+
+echo "create linebot/version.go"
+cat << EOS > linebot/version.go
+// Copyright 2016 LINE Corporation
+//
+// LINE Corporation licenses this file to you under the Apache License,
+// version 2.0 (the "License"); you may not use this file except in compliance
+// with the License. You may obtain a copy of the License at:
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+//
+// Don't edit this file directly. This file is generated by script/tag.sh .
+
+package linebot
+
+const version = "$VERSION"
+EOS
+
+git add linebot/version.go
+git commit -m "Update version to $TAG"
+echo "git tag $TAG"
+git tag $TAG