diff --git a/_site/Gemfile.lock b/_site/Gemfile.lock
index c39a2ba..e84acdc 100644
--- a/_site/Gemfile.lock
+++ b/_site/Gemfile.lock
@@ -21,7 +21,7 @@ GEM
     execjs (2.7.0)
     faraday (0.14.0)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.23)
+    ffi (1.15.5)
     forwardable-extended (2.6.0)
     gemoji (3.0.0)
     github-pages (179)