diff --git a/demo/Gemfile b/demo/Gemfile
index 4a2edaed3a..08f4195e70 100644
--- a/demo/Gemfile
+++ b/demo/Gemfile
@@ -48,8 +48,6 @@ group :development do
   gem "spring", "~> 4.2"
   gem "spring-watcher-listen", "~> 2.1"
   gem "hotwire-livereload", "~> 1.4"
-  # Use JavaScript with ESM import maps [https://github.com/rails/importmap-rails]
-  gem "importmap-rails"
 
   # Hotwire's SPA-like page accelerator [https://turbo.hotwired.dev]
   gem "turbo-rails"
diff --git a/demo/Gemfile.lock b/demo/Gemfile.lock
index 430d3a7324..469b27f535 100644
--- a/demo/Gemfile.lock
+++ b/demo/Gemfile.lock
@@ -136,10 +136,6 @@ GEM
     http-form_data (2.3.0)
     i18n (1.14.6)
       concurrent-ruby (~> 1.0)
-    importmap-rails (2.0.1)
-      actionpack (>= 6.0.0)
-      activesupport (>= 6.0.0)
-      railties (>= 6.0.0)
     io-console (0.7.2)
     irb (1.14.0)
       rdoc (>= 4.0.0)
@@ -368,7 +364,6 @@ DEPENDENCIES
   cssbundling-rails (~> 1.4)
   foreman
   hotwire-livereload (~> 1.4)
-  importmap-rails
   kind-rb (~> 0.1)
   kuby-azure (~> 0.4.0)
   kuby-core (~> 0.20)