diff --git a/Gemfile b/Gemfile
index 95545d6..be269b4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,5 +1,5 @@
 source 'https://rubygems.org'
 
-gem 'griddler', '1.1.0'
+gem 'griddler', '~>1.5.0'
 
 gemspec
diff --git a/lib/griddler/mailgun/version.rb b/lib/griddler/mailgun/version.rb
index 5dfa2cf..173f9e9 100644
--- a/lib/griddler/mailgun/version.rb
+++ b/lib/griddler/mailgun/version.rb
@@ -1,5 +1,5 @@
 module Griddler
   module Mailgun
-    VERSION = "1.1.0"
+    VERSION = "1.1.1"
   end
 end