diff --git a/Gemfile b/Gemfile
index 60920bee..bbb2290e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -15,4 +15,4 @@ gem "twitter-text", "~> 1.14"
 gem "asciidoctor", "~> 2.0.5"
 gem "rake"
 gem "rexml"
-gem "nokogiri", "~> 1.18.8"
+gem "nokogiri", "~> 1.18.9"
diff --git a/Gemfile.lock b/Gemfile.lock
index 9ee4b029..9f63becf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -55,21 +55,21 @@ GEM
       concurrent-ruby (~> 1.0)
     logger (1.7.0)
     mini_mime (1.1.5)
-    mini_portile2 (2.8.8)
+    mini_portile2 (2.8.9)
     minitest (5.25.5)
     mutex_m (0.3.0)
-    nokogiri (1.18.8)
+    nokogiri (1.18.9)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.18.8-aarch64-linux-gnu)
+    nokogiri (1.18.9-aarch64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.18.8-arm-linux-gnu)
+    nokogiri (1.18.9-arm-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.18.8-arm64-darwin)
+    nokogiri (1.18.9-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.8-x86_64-darwin)
+    nokogiri (1.18.9-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.8-x86_64-linux-gnu)
+    nokogiri (1.18.9-x86_64-linux-gnu)
       racc (~> 1.4)
     nokogiri-diff (0.3.0)
       nokogiri (~> 1.5)
@@ -128,7 +128,7 @@ DEPENDENCIES
   html-pipeline (~> 1.0)
   kramdown
   minitest (~> 5.4, >= 5.4.3)
-  nokogiri (~> 1.18.8)
+  nokogiri (~> 1.18.9)
   nokogiri-diff (~> 0.3.0)
   org-ruby (= 0.9.12)
   rake