diff --git a/Gemfile.lock b/Gemfile.lock
index 4cc26d8..2f148bc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -93,21 +93,21 @@ GEM
       rb-fsevent (>= 0.9.3)
       rb-inotify (>= 0.9.7)
     mercenary (0.3.6)
-    mini_portile2 (2.1.0)
+    mini_portile2 (2.5.1)
     minitest (5.9.0)
     multipart-post (2.0.0)
     net-dns (0.8.0)
-    nokogiri (1.8.2)
-      mini_portile2 (~> 2.1.0)
-      pkg-config (~> 1.1.7)
+    nokogiri (1.11.4)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     octokit (4.3.0)
       sawyer (~> 0.7.0, >= 0.5.3)
-    pkg-config (1.1.7)
     posix-spawn (0.3.11)
     public_suffix (1.5.3)
     pygments.rb (0.6.3)
       posix-spawn (~> 0.3.6)
       yajl-ruby (~> 1.2.0)
+    racc (1.5.2)
     rb-fsevent (0.9.7)
     rb-inotify (0.9.7)
       ffi (>= 0.5.0)
@@ -124,7 +124,7 @@ GEM
       ethon (>= 0.8.0)
     tzinfo (1.2.2)
       thread_safe (~> 0.1)
-    yajl-ruby (1.3.1)
+    yajl-ruby (1.2.3)
 
 PLATFORMS
   ruby