diff --git a/Gemfile.lock b/Gemfile.lock
index 0cd8918..16c281a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -238,7 +238,7 @@ GEM
     thread_safe (0.3.6)
     typhoeus (1.3.1)
       ethon (>= 0.9.0)
-    tzinfo (1.2.6)
+    tzinfo (1.2.10)
       thread_safe (~> 0.1)
     tzinfo-data (1.2019.3)
       tzinfo (>= 1.0.0)
@@ -253,6 +253,7 @@ DEPENDENCIES
   faraday (< 1.0)
   github-pages
   jekyll-feed (~> 0.12)
+  jekyll-github-metadata
   jekyll-octicons
   minima (~> 2.5)
   tzinfo (~> 1.2)