diff --git a/Gemfile.lock b/Gemfile.lock
index 27b9b0579e..1f8af10df8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -427,7 +427,7 @@ GEM
       actionpack (>= 3.0.0)
       activesupport (>= 3.0.0)
     kgio (2.11.3)
-    knapsack (1.19.0)
+    knapsack (1.20.0)
       rake
     launchy (2.4.3)
       addressable (~> 2.3)