diff --git a/files/.github/workflows/ci.yml b/files/.github/workflows/ci.yml
index 548f17c8..608de622 100644
--- a/files/.github/workflows/ci.yml
+++ b/files/.github/workflows/ci.yml
@@ -53,8 +53,8 @@ jobs:
       fail-fast: false
       matrix:
         try-scenario:
-          - ember-lts-4.8
           - ember-lts-4.12
+          - ember-lts-5.4
           - ember-release
           - ember-beta
           - ember-canary
diff --git a/files/README.md b/files/README.md
index 1f184413..cc7ba724 100644
--- a/files/README.md
+++ b/files/README.md
@@ -4,7 +4,7 @@
 
 ## Compatibility
 
-- Ember.js v4.8 or above
+- Ember.js v4.12 or above
 - Embroider or ember-auto-import v2
 
 ## Installation
diff --git a/files/test-app-overrides/config/ember-try.js b/files/test-app-overrides/config/ember-try.js
index bbf9836c..f38a47f7 100644
--- a/files/test-app-overrides/config/ember-try.js
+++ b/files/test-app-overrides/config/ember-try.js
@@ -9,18 +9,18 @@ module.exports = async function () {
     <% } else if (pnpm) { %>usePnpm: true,
     <% } %>scenarios: [
       {
-        name: 'ember-lts-4.8',
+        name: 'ember-lts-4.12',
         npm: {
           devDependencies: {
-            'ember-source': '~4.8.0',
+            'ember-source': '~4.12.0',
           },
         },
       },
       {
-        name: 'ember-lts-4.12',
+        name: 'ember-lts-5.4',
         npm: {
           devDependencies: {
-            'ember-source': '~4.12.0',
+            'ember-source': '~5.4.0',
           },
         },
       },
diff --git a/tests/fixtures/default/.github/workflows/ci.yml b/tests/fixtures/default/.github/workflows/ci.yml
index 5a39b0b5..e7987dc4 100644
--- a/tests/fixtures/default/.github/workflows/ci.yml
+++ b/tests/fixtures/default/.github/workflows/ci.yml
@@ -53,8 +53,8 @@ jobs:
       fail-fast: false
       matrix:
         try-scenario:
-          - ember-lts-4.8
           - ember-lts-4.12
+          - ember-lts-5.4
           - ember-release
           - ember-beta
           - ember-canary
diff --git a/tests/fixtures/pnpm/.github/workflows/ci.yml b/tests/fixtures/pnpm/.github/workflows/ci.yml
index 8ce139b2..a1f301c7 100644
--- a/tests/fixtures/pnpm/.github/workflows/ci.yml
+++ b/tests/fixtures/pnpm/.github/workflows/ci.yml
@@ -47,8 +47,8 @@ jobs:
       fail-fast: false
       matrix:
         try-scenario:
-          - ember-lts-4.8
           - ember-lts-4.12
+          - ember-lts-5.4
           - ember-release
           - ember-beta
           - ember-canary
diff --git a/tests/fixtures/yarn/.github/workflows/ci.yml b/tests/fixtures/yarn/.github/workflows/ci.yml
index 649cf3ed..829048fb 100644
--- a/tests/fixtures/yarn/.github/workflows/ci.yml
+++ b/tests/fixtures/yarn/.github/workflows/ci.yml
@@ -53,8 +53,8 @@ jobs:
       fail-fast: false
       matrix:
         try-scenario:
-          - ember-lts-4.8
           - ember-lts-4.12
+          - ember-lts-5.4
           - ember-release
           - ember-beta
           - ember-canary