diff --git a/Gemfile.lock b/Gemfile.lock
index 6b81ed4d..7c0611e8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -101,13 +101,13 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.6)
     connection_pool (3.0.2)
     crass (1.0.6)
     cssbundling-rails (1.4.2)
       railties (>= 6.0.0)
     csv (3.3.5)
-    date (3.5.0)
+    date (3.5.1)
     debug (1.11.0)
       irb (~> 1.10)
       reline (>= 0.3.8)
@@ -145,7 +145,7 @@ GEM
       pp (>= 0.6.0)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
-    json (2.17.1)
+    json (2.18.0)
     kaminari (1.2.2)
       activesupport (>= 4.1.0)
       kaminari-actionview (= 1.2.2)
@@ -172,7 +172,7 @@ GEM
     matrix (0.4.3)
     mini_mime (1.1.5)
     mini_portile2 (2.8.9)
-    minitest (5.26.2)
+    minitest (5.27.0)
     net-imap (0.5.12)
       date
       net-protocol
@@ -194,7 +194,7 @@ GEM
     pp (0.6.3)
       prettyprint
     prettyprint (0.2.0)
-    psych (5.2.6)
+    psych (5.3.0)
       date
       stringio
     public_suffix (7.0.0)
@@ -244,7 +244,7 @@ GEM
       activerecord (>= 7.2)
       activesupport (>= 7.2)
       i18n
-    rdoc (6.16.1)
+    rdoc (6.17.0)
       erb
       psych (>= 4.0.0)
       tsort
@@ -257,7 +257,7 @@ GEM
     rexml (3.4.4)
     rubyzip (3.2.2)
     securerandom (0.4.1)
-    selenium-webdriver (4.38.0)
+    selenium-webdriver (4.39.0)
       base64 (~> 0.2)
       logger (~> 1.4)
       rexml (~> 3.2, >= 3.2.5)
@@ -286,7 +286,7 @@ GEM
     sqlite3 (2.8.1-x86_64-linux-gnu)
     stringio (3.1.9)
     thor (1.4.0)
-    timeout (0.4.4)
+    timeout (0.5.0)
     tsort (0.2.0)
     tzinfo (2.0.6)
       concurrent-ruby (~> 1.0)
@@ -329,4 +329,4 @@ RUBY VERSION
   ruby 3.4.7p58
 
 BUNDLED WITH
-  4.0.0
+  4.0.1
diff --git a/config/application.rb b/config/application.rb
index 262d716e..92dfe23b 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -21,7 +21,7 @@
 module ActiveAdminDemo
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
-    config.load_defaults 8.0
+    config.load_defaults 8.1
 
     # Please, add to the `ignore` list any other `lib` subdirectories that do
     # not contain `.rb` files, or that should not be reloaded or eager loaded.
diff --git a/package.json b/package.json
index 14aeca57..9322d915 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "type": "module",
   "dependencies": {
     "@activeadmin/activeadmin": "4.0.0-beta19",
-    "tailwindcss": "^4.1.17"
+    "tailwindcss": "^4.1.18"
   },
   "scripts": {
     "build:css": "npx @tailwindcss/cli -i ./app/assets/stylesheets/active_admin.css -o ./app/assets/builds/active_admin.css --minify"
diff --git a/yarn.lock b/yarn.lock
index 53b5d93c..308af7b5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -164,7 +164,7 @@ supports-preserve-symlinks-flag@^1.0.0:
   resolved "https://registry.yarnpkg.com/supports-preserve-symlinks-flag/-/supports-preserve-symlinks-flag-1.0.0.tgz#6eda4bd344a3c94aea376d4cc31bc77311039e09"
   integrity sha512-ot0WnXS9fgdkgIcePe6RHNk1WA8+muPa6cSjeR3V8K27q9BB1rTE3R1p7Hv0z1ZyAc8s6Vvv8DIyWf681MAt0w==
 
-tailwindcss@^4.1.17:
-  version "4.1.17"
-  resolved "https://registry.yarnpkg.com/tailwindcss/-/tailwindcss-4.1.17.tgz#e6dcb7a9c60cef7522169b5f207ffec2fd652286"
-  integrity sha512-j9Ee2YjuQqYT9bbRTfTZht9W/ytp5H+jJpZKiYdP/bpnXARAuELt9ofP0lPnmHjbga7SNQIxdTAXCmtKVYjN+Q==
+tailwindcss@^4.1.18:
+  version "4.1.18"
+  resolved "https://registry.yarnpkg.com/tailwindcss/-/tailwindcss-4.1.18.tgz#f488ba47853abdb5354daf9679d3e7791fc4f4e3"
+  integrity sha512-4+Z+0yiYyEtUVCScyfHCxOYP06L5Ne+JiHhY2IjR2KWMIWhJOYZKLSGZaP5HkZ8+bY0cxfzwDE5uOmzFXyIwxw==