diff --git a/Gemfile.lock b/Gemfile.lock
index 57131bb..dcfd255 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,7 +18,7 @@ GEM
     execjs (2.7.0)
     faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.14)
+    ffi (1.15.1)
     gemoji (2.1.0)
     github-pages (80)
       github-pages-health-check (= 1.1.0)