diff --git a/Gemfile.lock b/Gemfile.lock
index dd87335a96..cdf7725388 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -136,7 +136,7 @@ GEM
       daemons (~> 1.0, >= 1.0.9)
       eventmachine (~> 1.0, >= 1.0.4)
       rack (>= 1, < 3)
-    thor (1.3.2)
+    thor (1.4.0)
     tilt (2.6.0)
     tty-pager (0.14.0)
       strings (~> 0.2.0)