diff --git a/Gemfile.lock b/Gemfile.lock
index 58b1441a..82fc1154 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -33,7 +33,7 @@ GEM
       sass (>= 3.2, < 3.5)
     erubis (2.7.0)
     execjs (2.6.0)
-    ffi (1.9.10)
+    ffi (1.15.0)
     haml (4.0.7)
       tilt
     hike (1.2.3)