diff --git a/Gemfile b/Gemfile
index ae2b3561..7335ceb8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,7 +6,7 @@ gem 'guard-nanoc', '~> 1.0.3'
 gem 'systemu', '~> 2.6.5'
 gem 'adsf', '~> 1.2.0'
 gem 'sass', '~> 3.4.21'
-gem 'rdiscount', '~> 2.1.8'
+gem 'rdiscount', '~> 2.2.7'
 gem 'nokogiri', '~> 1.10.8'
 gem 'feedjira', '~> 2.0.0'
 gem 'ri_cal', '~> 0.8.8'
diff --git a/Gemfile.lock b/Gemfile.lock
index f1c8e59d..8e3a6a11 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -84,7 +84,7 @@ GEM
     rb-fsevent (0.10.2)
     rb-inotify (0.9.10)
       ffi (>= 0.5.0, < 2)
-    rdiscount (2.1.8)
+    rdiscount (2.2.7.4)
     retryable (2.0.4)
     ri_cal (0.8.8)
     rqrcode (0.10.1)
@@ -133,7 +133,7 @@ DEPENDENCIES
   guard-nanoc (~> 1.0.3)
   nanoc (~> 3.7.5)
   nokogiri (~> 1.10.8)
-  rdiscount (~> 2.1.8)
+  rdiscount (~> 2.2.7)
   ri_cal (~> 0.8.8)
   rqrcode_png (~> 0.1.5)
   sass (~> 3.4.21)