diff --git a/Gemfile.lock b/Gemfile.lock
index 06041b025..5a49a290f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -60,7 +60,7 @@ GEM
       timers (>= 1.0.0)
     childprocess (0.3.9)
       ffi (~> 1.0, >= 1.0.11)
-    chunky_png (1.2.7)
+    chunky_png (1.2.8)
     client_side_validations (3.2.2)
     coderay (1.0.9)
     coffee-rails (3.2.2)