diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 466e89d37d..55648a90ba 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -28,7 +28,7 @@ GEM
     execjs (2.7.0)
     faraday (1.0.1)
       multipart-post (>= 1.2, < 3)
-    ffi (1.12.2)
+    ffi (1.13.0)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
     github-pages (206)