diff --git a/Gemfile b/Gemfile
index 7de00907..f0823931 100644
--- a/Gemfile
+++ b/Gemfile
@@ -6,4 +6,4 @@ gemspec
 
 # Keep development bundle compatible with both Ruby 2.7 CI and newer local Rubies.
 # Nokogiri 1.19+ requires Ruby 3.2+, which breaks the repo's Ruby 2.7 matrix.
-gem "nokogiri", "~> 1.15.7"
+gem "nokogiri", "~> 1.19.3"
diff --git a/Gemfile.lock b/Gemfile.lock
index ef0305ae..a3b122eb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -172,14 +172,14 @@ GEM
     net-smtp (0.5.0)
       net-protocol
     nio4r (2.7.3)
-    nokogiri (1.15.7)
+    nokogiri (1.19.3)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.15.7-arm64-darwin)
+    nokogiri (1.19.3-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.15.7-x86_64-darwin)
+    nokogiri (1.19.3-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.15.7-x86_64-linux)
+    nokogiri (1.19.3-x86_64-linux-gnu)
       racc (~> 1.4)
     notiffany (0.1.3)
       nenv (~> 0.1)
@@ -276,7 +276,7 @@ DEPENDENCIES
   jbuilder
   listen (~> 3.0.0)
   minitest-retry
-  nokogiri (~> 1.15.7)
+  nokogiri (~> 1.19.3)
   package_json
   pry-byebug (~> 3.8.0)
   rails (~> 7.0.7, >= 7.0.7.2)