diff --git a/lib/install/web.rb b/lib/install/web.rb
index 1796f474..9b093788 100644
--- a/lib/install/web.rb
+++ b/lib/install/web.rb
@@ -28,7 +28,7 @@ def apply_template!
         if ARGV.include?("--suspenders-main")
           gem "suspenders", github: "thoughtbot/suspenders", branch: "main"
         else
-          gem "suspenders"
+          gem "suspenders", "~> 3"
         end
       end
 
diff --git a/test/generators/suspenders/install/web_generator_test.rb b/test/generators/suspenders/install/web_generator_test.rb
index b2740732..43c11c78 100644
--- a/test/generators/suspenders/install/web_generator_test.rb
+++ b/test/generators/suspenders/install/web_generator_test.rb
@@ -12,6 +12,14 @@ class WebGeneratorTest < Rails::Generators::TestCase
         setup :prepare_destination
         teardown :restore_destination
 
+        test "generates Gemfile entry with version constraint" do
+          with_database "postgresql" do
+            run_generator
+          end
+
+          assert_file "Gemfile", /gem "suspenders", "~> 3"/
+        end
+
         test "raises if API only application" do
           within_api_only_app do
             assert_raises Suspenders::Generators::APIAppUnsupported::Error do