diff --git a/Gemfile.lock b/Gemfile.lock
index a64797568a6c..e32b7c24b583 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -3,7 +3,7 @@ GEM
   specs:
     RedCloth (4.3.2)
     addressable (2.4.0)
-    chunky_png (1.3.6)
+    chunky_png (1.4.0)
     coderay (1.1.1)
     colorator (1.1.0)
     compass (0.12.7)