diff --git a/Gemfile.lock b/Gemfile.lock
index ea42704..d3513bb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,7 +19,7 @@ GEM
     execjs (2.7.0)
     faraday (0.11.0)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.17)
+    ffi (1.15.5)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
     github-pages (123)