diff --git a/Gemfile.lock b/Gemfile.lock
index 5bf3a18..ad37755 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,7 +4,7 @@ GEM
     addressable (2.5.1)
       public_suffix (~> 2.0, >= 2.0.2)
     colorator (1.1.0)
-    ffi (1.9.18)
+    ffi (1.12.1)
     forwardable-extended (2.6.0)
     jekyll (3.4.3)
       addressable (~> 2.4)