diff --git a/Gemfile.lock b/Gemfile.lock
index 790f22e..ad0bdf5 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -26,7 +26,7 @@ GEM
     execjs (2.7.0)
     faraday (0.15.1)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.23)
+    ffi (1.15.5)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
     github-pages (185)