diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 057deeb015..599994ae6f 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -238,10 +238,9 @@ GEM
     thread_safe (0.3.6)
     typhoeus (1.3.0)
       ethon (>= 0.9.0)
-    tzinfo (1.2.5)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     unicode-display_width (1.4.0)
-    wdm (0.1.1)
 
 PLATFORMS
   ruby
@@ -249,7 +248,6 @@ PLATFORMS
 
 DEPENDENCIES
   github-pages
-  wdm (>= 0.1.0)
 
 BUNDLED WITH
    1.16.5