diff --git a/Gemfile.lock b/Gemfile.lock
index 4f726cceaf7..79a1ee0bbd0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -180,7 +180,7 @@ GEM
     fast_blank (0.0.1)
       rake
       rake-compiler
-    fast_stack (0.0.4)
+    fast_stack (0.0.5)
       rake
       rake-compiler
     fast_xs (0.8.0)
diff --git a/Gemfile_rails4.lock b/Gemfile_rails4.lock
index 513364a7754..28d1aa381d5 100644
--- a/Gemfile_rails4.lock
+++ b/Gemfile_rails4.lock
@@ -216,7 +216,7 @@ GEM
     fast_blank (0.0.1)
       rake
       rake-compiler
-    fast_stack (0.0.4)
+    fast_stack (0.0.5)
       rake
       rake-compiler
     fast_xs (0.8.0)