diff --git a/Gemfile.lock b/Gemfile.lock
index eb1a1789b..57b6b4cdb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -59,7 +59,7 @@ GEM
       timers (~> 1.1.0)
     childprocess (0.3.9)
       ffi (~> 1.0, >= 1.0.11)
-    chunky_png (1.2.8)
+    chunky_png (1.2.9)
     client_side_validations (3.2.6)
     coderay (1.1.0)
     coffee-rails (3.2.2)