diff --git a/Gemfile.lock b/Gemfile.lock
index 94d7d30..f0f80de 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -43,6 +43,8 @@ GEM
       listen (~> 3.0)
     kramdown (2.3.1)
       rexml
+    kramdown-parser-gfm (1.1.0)
+      kramdown (~> 2.0)
     liquid (4.0.3)
     listen (3.7.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
@@ -75,6 +77,7 @@ DEPENDENCIES
   jekyll-feed (~> 0.15.1)
   jekyll-seo-tag (~> 2.7.1)
   jekyll-tidy
+  kramdown-parser-gfm
   no-style-please
   tzinfo (~> 1.2)
   tzinfo-data