diff --git a/site/Gemfile.lock b/site/Gemfile.lock
index 065107ec25f..8bdc69cdd66 100644
--- a/site/Gemfile.lock
+++ b/site/Gemfile.lock
@@ -21,7 +21,7 @@ GEM
     eventmachine (1.0.3)
     execjs (1.4.0)
       multi_json (~> 1.0)
-    ffi (1.9.3)
+    ffi (1.15.0)
     fssm (0.2.10)
     haml (4.0.4)
       tilt