diff --git a/lib/github_bot/github/client.rb b/lib/github_bot/github/client.rb
index f71e3eb..f0de61d 100644
--- a/lib/github_bot/github/client.rb
+++ b/lib/github_bot/github/client.rb
@@ -2,6 +2,7 @@
 
 require 'octokit'
 require 'uri'
+require 'jwt'
 require_relative 'payload'
 
 module GithubBot
@@ -180,7 +181,7 @@ def private_key
           exp: current + (10 * 60),
           iss: ENV['GITHUB_APP_IDENTIFIER']
         }
-        JWT.encode(payload, private_key, 'RS256')
+        ::JWT.encode(payload, private_key, 'RS256')
       end
 
       # relay messages to Octokit::Client if responds to allow extension
diff --git a/lib/github_bot/version.rb b/lib/github_bot/version.rb
index da638d0..ec16e79 100644
--- a/lib/github_bot/version.rb
+++ b/lib/github_bot/version.rb
@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 module GithubBot
-  VERSION = '0.2.0'
+  VERSION = '0.2.1'
 
   # version module
   module Version