diff --git a/Gemfile.lock b/Gemfile.lock
index 82084bdfca..ed759279ac 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -245,7 +245,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    combine_pdf (1.0.26)
+    combine_pdf (1.0.31)
       matrix
       ruby-rc4 (>= 0.1.5)
     concurrent-ruby (1.3.5)
@@ -477,7 +477,7 @@ GEM
       net-pop
       net-smtp
     marcel (1.1.0)
-    matrix (0.4.2)
+    matrix (0.4.3)
     method_source (1.1.0)
     mime-types (3.7.0)
       logger