diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 4603ff3182..bcf006940f 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -223,7 +223,7 @@ GEM
       forwardable-extended (~> 2.6)
     public_suffix (3.1.1)
     rainbow (3.0.0)
-    rake (12.3.3)
+    rake (13.0.0)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)