diff --git a/Gemfile.lock b/Gemfile.lock
index 407cc6d96..0336cdaba 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,7 +22,7 @@ GEM
       gherkin (~> 2.11.7)
       multi_json (~> 1.3)
     diff-lcs (1.2.4)
-    ffi (1.9.0)
+    ffi (1.15.4)
     gherkin (2.11.8)
       multi_json (~> 1.3)
     hpricot (0.8.6)