diff --git a/Gemfile.lock b/Gemfile.lock
index 251a2abbcf..f41baed373 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -217,7 +217,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    combine_pdf (1.0.22)
+    combine_pdf (1.0.23)
       matrix
       ruby-rc4 (>= 0.1.5)
     concurrent-ruby (1.2.2)