diff --git a/Gemfile.lock b/Gemfile.lock
index 8fc1cdb..eff850b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -105,7 +105,7 @@ GEM
       sqlite3 (~> 1.3)
       xcinvoke (~> 0.3.0)
     json (2.5.1)
-    kramdown (2.3.0)
+    kramdown (2.3.1)
       rexml
     kramdown-parser-gfm (1.1.0)
       kramdown (~> 2.0)
@@ -155,6 +155,7 @@ GEM
       nanaimo (~> 0.3.0)
 
 PLATFORMS
+  ruby
   x86_64-darwin-20
 
 DEPENDENCIES