diff --git a/Gemfile.lock b/Gemfile.lock
index 8c3d541..7591268 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: http://rubygems.org/
   specs:
     diff-lcs (1.1.3)
-    ffi (1.1.5)
+    ffi (1.15.5)
     git (1.2.5)
     gli (2.1.0)
     guard (1.3.2)