diff --git a/debug_fasp/Gemfile b/debug_fasp/Gemfile
index 6483d6e..35794b6 100644
--- a/debug_fasp/Gemfile
+++ b/debug_fasp/Gemfile
@@ -15,7 +15,7 @@ gem "turbo-rails"
 # Hotwire's modest JavaScript framework [https://stimulus.hotwired.dev]
 gem "stimulus-rails"
 # Use Tailwind CSS [https://github.com/rails/tailwindcss-rails]
-gem "tailwindcss-rails", "~> 3.3.1"
+gem "tailwindcss-rails", "~> 4.2.1"
 # Build JSON APIs with ease [https://github.com/rails/jbuilder]
 gem "jbuilder"
 
diff --git a/debug_fasp/Gemfile.lock b/debug_fasp/Gemfile.lock
index 2f81170..c564c66 100644
--- a/debug_fasp/Gemfile.lock
+++ b/debug_fasp/Gemfile.lock
@@ -170,7 +170,7 @@ GEM
     matrix (0.4.2)
     mini_mime (1.1.5)
     mini_portile2 (2.8.8)
-    minitest (5.25.4)
+    minitest (5.25.5)
     msgpack (1.8.0)
     net-imap (0.5.6)
       date
@@ -182,24 +182,24 @@ GEM
     net-smtp (0.5.1)
       net-protocol
     nio4r (2.7.4)
-    nokogiri (1.18.2)
+    nokogiri (1.18.5)
       mini_portile2 (~> 2.8.2)
       racc (~> 1.4)
-    nokogiri (1.18.2-aarch64-linux-gnu)
+    nokogiri (1.18.5-aarch64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.18.2-aarch64-linux-musl)
+    nokogiri (1.18.5-aarch64-linux-musl)
       racc (~> 1.4)
-    nokogiri (1.18.2-arm-linux-gnu)
+    nokogiri (1.18.5-arm-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.18.2-arm-linux-musl)
+    nokogiri (1.18.5-arm-linux-musl)
       racc (~> 1.4)
-    nokogiri (1.18.2-arm64-darwin)
+    nokogiri (1.18.5-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.2-x86_64-darwin)
+    nokogiri (1.18.5-x86_64-darwin)
       racc (~> 1.4)
-    nokogiri (1.18.2-x86_64-linux-gnu)
+    nokogiri (1.18.5-x86_64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.18.2-x86_64-linux-musl)
+    nokogiri (1.18.5-x86_64-linux-musl)
       racc (~> 1.4)
     openssl (3.3.0)
     parallel (1.26.3)
@@ -222,7 +222,7 @@ GEM
       nio4r (~> 2.0)
     raabro (1.4.0)
     racc (1.8.1)
-    rack (3.1.10)
+    rack (3.1.12)
     rack-session (2.1.0)
       base64 (>= 0.1.0)
       rack (>= 3.0.0)
@@ -333,16 +333,17 @@ GEM
       base64
     stimulus-rails (1.3.4)
       railties (>= 6.0.0)
-    stringio (3.1.3)
-    tailwindcss-rails (3.3.1)
+    stringio (3.1.5)
+    tailwindcss-rails (4.2.1)
       railties (>= 7.0.0)
-      tailwindcss-ruby (~> 3.0)
-    tailwindcss-ruby (3.4.17)
-    tailwindcss-ruby (3.4.17-aarch64-linux)
-    tailwindcss-ruby (3.4.17-arm-linux)
-    tailwindcss-ruby (3.4.17-arm64-darwin)
-    tailwindcss-ruby (3.4.17-x86_64-darwin)
-    tailwindcss-ruby (3.4.17-x86_64-linux)
+      tailwindcss-ruby (~> 4.0)
+    tailwindcss-ruby (4.0.14)
+    tailwindcss-ruby (4.0.14-aarch64-linux-gnu)
+    tailwindcss-ruby (4.0.14-aarch64-linux-musl)
+    tailwindcss-ruby (4.0.14-arm64-darwin)
+    tailwindcss-ruby (4.0.14-x86_64-darwin)
+    tailwindcss-ruby (4.0.14-x86_64-linux-gnu)
+    tailwindcss-ruby (4.0.14-x86_64-linux-musl)
     thor (1.3.2)
     thruster (0.1.11)
     thruster (0.1.11-aarch64-linux)
@@ -358,7 +359,7 @@ GEM
     unicode-display_width (3.1.4)
       unicode-emoji (~> 4.0, >= 4.0.4)
     unicode-emoji (4.0.4)
-    uri (1.0.2)
+    uri (1.0.3)
     useragent (0.16.11)
     web-console (4.2.1)
       actionview (>= 6.0.0)
@@ -412,7 +413,7 @@ DEPENDENCIES
   solid_queue
   sqlite3 (>= 2.1)
   stimulus-rails
-  tailwindcss-rails (~> 3.3.1)
+  tailwindcss-rails (~> 4.2.1)
   thruster
   turbo-rails
   tzinfo-data