diff --git a/Gemfile b/Gemfile
index 49fd289..0cecf6e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
 source 'http://rubygems.org'
 
-gem 'thor', '~> 0.20.3'
+gem 'thor', '~> 1.4.0'
 gem 'pry'
diff --git a/Gemfile.lock b/Gemfile.lock
index c781223..0eb2930 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -6,14 +6,14 @@ GEM
     pry (0.12.2)
       coderay (~> 1.1.0)
       method_source (~> 0.9.0)
-    thor (0.20.3)
+    thor (1.4.0)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   pry
-  thor (~> 0.20.3)
+  thor (~> 1.4.0)
 
 BUNDLED WITH
    2.0.1