diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 34c68d1f9e..7ff7679577 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -45,7 +45,7 @@ GEM
     faraday-net_http_persistent (1.2.0)
     faraday-patron (1.0.0)
     faraday-rack (1.0.0)
-    ffi (1.15.3)
+    ffi (1.15.4)
     forwardable-extended (2.6.0)
     gemoji (3.0.1)
     github-pages (219)