diff --git a/Gemfile.lock b/Gemfile.lock
index ce39a82..fe805b0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -38,7 +38,7 @@ GEM
       jekyll (>= 3.8, < 5.0)
     jekyll-watch (2.2.1)
       listen (~> 3.0)
-    kramdown (2.3.0)
+    kramdown (2.3.1)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
@@ -68,6 +68,7 @@ GEM
     webrick (1.7.0)
 
 PLATFORMS
+  ruby
   x86_64-darwin-19
 
 DEPENDENCIES