diff --git a/Gemfile.lock b/Gemfile.lock
index 84a3dc1..150f4fc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,7 +9,7 @@ GEM
     addressable (2.5.0)
       public_suffix (~> 2.0, >= 2.0.2)
     colorator (1.1.0)
-    ffi (1.9.18)
+    ffi (1.11.3)
     forwardable-extended (2.6.0)
     i18n (0.8.1)
     jekyll (3.4.1)