diff --git a/app/app.js b/app/app.js
index 083e8c8..5fcd511 100644
--- a/app/app.js
+++ b/app/app.js
@@ -5,10 +5,14 @@ import loadInitializers from 'ember-load-initializers';
 import config from 'rfcs-app/config/environment';
 import 'ember-a11y-refocus/styles.css';
 
+import setupInspector from '@embroider/legacy-inspector-support/ember-source-4.12';
+
 export default class App extends Application {
   modulePrefix = config.modulePrefix;
   podModulePrefix = config.podModulePrefix;
   Resolver = Resolver.withModules(compatModules);
+
+  inspector = setupInspector(this);
 }
 
 loadInitializers(App, config.modulePrefix, compatModules);
diff --git a/package.json b/package.json
index 11344bf..571d81d 100644
--- a/package.json
+++ b/package.json
@@ -44,6 +44,7 @@
     "@embroider/compat": "^4.1.0",
     "@embroider/config-meta-loader": "^1.0.0",
     "@embroider/core": "^4.1.0",
+    "@embroider/legacy-inspector-support": "^0.1.2",
     "@embroider/macros": "^1.18.0",
     "@embroider/router": "^3.0.1",
     "@embroider/vite": "^1.1.5",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 282a5e4..bfff4d3 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -41,6 +41,9 @@ importers:
       '@embroider/core':
         specifier: ^4.1.0
         version: 4.1.0
+      '@embroider/legacy-inspector-support':
+        specifier: ^0.1.2
+        version: 0.1.2
       '@embroider/macros':
         specifier: ^1.18.0
         version: 1.18.0
@@ -1023,6 +1026,9 @@ packages:
     resolution: {integrity: sha512-boX+qHg2O24l9braMOC0RQHCwV+dLoQVqRZcvevKxETAPO9HK8mo2pgR/w7bdB9yfFbBjucxs8x4uEIgfRKWJw==}
     engines: {node: 12.* || 14.* || >= 16}
 
+  '@embroider/legacy-inspector-support@0.1.2':
+    resolution: {integrity: sha512-mKQCEciMtylTnOyBI/B7q5+MFFt6n8RRVXu8sQvAZ05ZRz+MmYEW8nIjV24rRCUAS/irLicjDGrBwNVZFOPCfA==}
+
   '@embroider/macros@1.18.0':
     resolution: {integrity: sha512-KanP80XxNK4bmQ1HKTcUjy/cdCt9n7knPMLK1vzHdOFymACHo+GbhgUjXjYdOCuBTv+ZwcjL2P2XDmBcYS9r8g==}
     engines: {node: 12.* || 14.* || >= 16}
@@ -9208,6 +9214,12 @@ snapshots:
       - supports-color
       - utf-8-validate
 
+  '@embroider/legacy-inspector-support@0.1.2':
+    dependencies:
+      '@embroider/addon-shim': 1.10.0
+    transitivePeerDependencies:
+      - supports-color
+
   '@embroider/macros@1.18.0':
     dependencies:
       '@embroider/shared-internals': 3.0.0