diff --git a/Gemfile.lock b/Gemfile.lock
index 7ba63057ee3..090bce0c8dd 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -165,7 +165,7 @@ GEM
     chunky_png (1.4.0)
     climate_control (1.2.0)
     cocoon (1.2.15)
-    color_diff (0.1)
+    color_diff (0.2)
     concurrent-ruby (1.3.6)
     connection_pool (2.5.5)
     cose (1.3.1)