diff --git a/Gemfile.lock b/Gemfile.lock
index 452ed8595..0a1530255 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -156,7 +156,7 @@ GEM
     choice (0.2.0)
     climate_control (1.2.0)
     coderay (1.1.3)
-    combine_pdf (1.0.26)
+    combine_pdf (1.0.29)
       matrix
       ruby-rc4 (>= 0.1.5)
     concurrent-ruby (1.3.4)