diff --git a/Gemfile.lock b/Gemfile.lock
index 7f00706..d2ce14b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -5,7 +5,7 @@ GEM
     colorator (1.1.0)
     faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.14)
+    ffi (1.15.5)
     forwardable-extended (2.6.0)
     jekyll (3.2.1)
       colorator (~> 1.0)