diff --git a/Gemfile.lock b/Gemfile.lock
index 6d96be1..55fad68 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -18,8 +18,8 @@ GEM
     execjs (2.7.0)
     faraday (0.9.2)
       multipart-post (>= 1.2, < 3)
-    ffi (1.9.13)
-    ffi (1.9.13-x64-mingw32)
+    ffi (1.13.1)
+    ffi (1.13.1-x64-mingw32)
     gemoji (2.1.0)
     github-pages (86)
       github-pages-health-check (= 1.1.0)