diff --git a/Gemfile.lock b/Gemfile.lock
index bb4abd6..bd43fbb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -8,7 +8,7 @@ GEM
   remote: http://rubygems.org/
   specs:
     diff-lcs (1.1.3)
-    ffi (1.0.11)
+    ffi (1.15.5)
     growl (1.0.3)
     guard (1.0.0)
       ffi (>= 0.5.0)