diff --git a/site/jekyll/Gemfile.lock b/site/jekyll/Gemfile.lock
index aba6c494e..83b9ceb6b 100644
--- a/site/jekyll/Gemfile.lock
+++ b/site/jekyll/Gemfile.lock
@@ -12,8 +12,8 @@ GEM
       highline (~> 1.6.11)
     crass (1.0.2)
     fast-stemmer (1.0.2)
-    ffi (1.9.18)
-    ffi (1.9.18-x64-mingw32)
+    ffi (1.13.1)
+    ffi (1.13.1-x64-mingw32)
     highline (1.6.21)
     hike (1.2.3)
     jekyll (1.5.1)