diff --git a/Gemfile b/Gemfile
index 561d1e007..5346d7b52 100644
--- a/Gemfile
+++ b/Gemfile
@@ -117,7 +117,7 @@ group :development, :test do
   gem 'eslintrb'
   gem 'json', '~> 2.0'
   gem 'license_finder', '~> 7.0'
-  gem 'mdl', '0.12.0'
+  gem 'mdl', '0.13.0'
   # NOTE: If you update pronto you may need to update other pronto-* gems
   gem 'pronto', '~> 0.11'
   # TODO: Use pronto-railroader, once there is one.
diff --git a/Gemfile.lock b/Gemfile.lock
index dc1a80566..797456150 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -237,7 +237,7 @@ GEM
       net-smtp
     marcel (1.0.4)
     matrix (0.4.2)
-    mdl (0.12.0)
+    mdl (0.13.0)
       kramdown (~> 2.3)
       kramdown-parser-gfm (~> 1.1)
       mixlib-cli (~> 2.1, >= 2.1.1)
@@ -599,7 +599,7 @@ DEPENDENCIES
   license_finder (~> 7.0)
   lograge (~> 0.12)
   mail (~> 2.7)
-  mdl (= 0.12.0)
+  mdl (= 0.13.0)
   minitest-reporters
   minitest-retry
   octokit (~> 7)