diff --git a/_site/Gemfile.lock b/_site/Gemfile.lock
index 4fb94cb..1a447d1 100644
--- a/_site/Gemfile.lock
+++ b/_site/Gemfile.lock
@@ -2,7 +2,7 @@ GEM
   remote: https://rubygems.org/
   specs:
     colorator (1.1.0)
-    ffi (1.9.14)
+    ffi (1.15.5)
     forwardable-extended (2.6.0)
     jekyll (3.2.1)
       colorator (~> 1.0)