diff --git a/Gemfile.lock b/Gemfile.lock
index 606d684..600fee5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,7 @@ GEM
     factory_girl_rails (4.8.0)
       factory_girl (~> 4.8.0)
       railties (>= 3.0.0)
-    ffi (1.9.18)
+    ffi (1.13.1)
     globalid (0.4.0)
       activesupport (>= 4.2.0)
     i18n (0.8.4)