diff --git a/Gemfile.lock b/Gemfile.lock
index 183f9cd4b..a535c545d 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -208,17 +208,17 @@ GEM
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
     mercenary (0.3.6)
-    mini_portile2 (2.5.0)
+    mini_portile2 (2.5.1)
     minima (2.5.1)
       jekyll (>= 3.5, < 5.0)
       jekyll-feed (~> 0.9)
       jekyll-seo-tag (~> 2.1)
     multi_json (1.15.0)
     multipart-post (2.1.1)
-    nokogiri (1.11.2)
+    nokogiri (1.11.4)
       mini_portile2 (~> 2.5.0)
       racc (~> 1.4)
-    nokogiri (1.11.2-x64-mingw32)
+    nokogiri (1.11.4-x64-mingw32)
       racc (~> 1.4)
     octokit (4.20.0)
       faraday (>= 0.9)
@@ -261,7 +261,6 @@ GEM
     unf_ext (0.0.7.7)
     unf_ext (0.0.7.7-x64-mingw32)
     unicode-display_width (1.7.0)
-    wdm (0.1.1)
     webrick (1.7.0)
 
 PLATFORMS
@@ -273,7 +272,6 @@ DEPENDENCIES
   jekyll-feed (~> 0.6)
   just-the-docs (~> 0.3.0)
   tzinfo-data
-  wdm (~> 0.1.0)
   webrick (~> 1.7)
 
 BUNDLED WITH