diff --git a/Gemfile.lock b/Gemfile.lock
index 8e1afd2..05b7588 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -22,7 +22,7 @@ GEM
       multi_json (>= 1.7.5, < 2.0)
       multi_test (>= 0.1.1)
     diff-lcs (1.2.5)
-    ffi (1.9.6)
+    ffi (1.11.1)
     gherkin (2.12.2)
       multi_json (~> 1.3)
     minitest (5.5.1)