diff --git a/Gemfile.lock b/Gemfile.lock
index f88886708e..d586e1f7f4 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -239,7 +239,7 @@ GEM
       execjs
     coffee-script-source (1.10.0)
     colorize (0.8.1)
-    combine_pdf (1.0.15)
+    combine_pdf (1.0.16)
       ruby-rc4 (>= 0.1.5)
     compass (1.0.3)
       chunky_png (~> 1.2)