diff --git a/packages/@glimmer-workspace/integration-tests/test/helpers/hash-test.ts b/packages/@glimmer-workspace/integration-tests/test/helpers/hash-test.ts
index 1113ac3203..3b498af2b0 100644
--- a/packages/@glimmer-workspace/integration-tests/test/helpers/hash-test.ts
+++ b/packages/@glimmer-workspace/integration-tests/test/helpers/hash-test.ts
@@ -185,93 +185,6 @@ class HashTest extends RenderTest {
     this.assertHTML('Godfrey');
     this.assertStableRerender();
   }
-
-  @test
-  'defined hash keys can be updated'(assert: Assert) {
-    class FooBar extends GlimmerishComponent {
-      constructor(owner: object, args: { hash: Record<string, unknown> }) {
-        super(owner, args);
-        args.hash['firstName'] = 'Chad';
-
-        assert.strictEqual(args.hash['firstName'], 'Chad', 'Name updated in JS');
-      }
-    }
-
-    this.registerComponent('Glimmer', 'FooBar', `{{yield @hash}}`, FooBar);
-
-    this.render(
-      `<FooBar @hash={{hash firstName="Godfrey" lastName="Hietala"}} as |values|>{{values.firstName}} {{values.lastName}}</FooBar>`
-    );
-
-    // Name will not be updated in templates because templates access the child
-    // reference on hashes directly
-    this.assertHTML('Godfrey Hietala');
-    this.assertStableRerender();
-
-    assert.validateDeprecations(
-      /You set the 'firstName' property on a \{\{hash\}\} object. Setting properties on objects generated by \{\{hash\}\} is deprecated. Please update to use an object created with a tracked property or getter, or with a custom helper./u
-    );
-  }
-
-  @test
-  'defined hash keys are reset whenever the upstream changes'(assert: Assert) {
-    class FooBar extends GlimmerishComponent {
-      constructor(owner: object, args: { hash: Record<string, unknown> }) {
-        super(owner, args);
-        args.hash['name'] = 'Chad';
-      }
-
-      get alias() {
-        return (this.args['hash'] as Record<string, unknown>)['name'];
-      }
-    }
-
-    this.registerComponent('Glimmer', 'FooBar', `{{yield @hash this.alias}}`, FooBar);
-
-    this.render(
-      `<FooBar @hash={{hash name=this.name}} as |values alias|>{{values.name}} {{alias}}</FooBar>`,
-      {
-        name: 'Godfrey',
-      }
-    );
-
-    // JS alias will be updated, version accessed lazily in templates will not
-    this.assertHTML('Godfrey Chad');
-    this.assertStableRerender();
-
-    this.rerender({ name: 'Tom' });
-
-    // Both will be updated to match the new value
-    this.assertHTML('Tom Tom');
-    this.assertStableRerender();
-
-    assert.validateDeprecations(
-      /You set the 'name' property on a \{\{hash\}\} object. Setting properties on objects generated by \{\{hash\}\} is deprecated. Please update to use an object created with a tracked property or getter, or with a custom helper./u
-    );
-  }
-
-  @test
-  'undefined hash keys can be updated'(assert: Assert) {
-    class FooBar extends GlimmerishComponent {
-      constructor(owner: object, args: { hash: Record<string, unknown> }) {
-        super(owner, args);
-        args.hash['lastName'] = 'Chan';
-      }
-    }
-
-    this.registerComponent('Glimmer', 'FooBar', `{{yield @hash}}`, FooBar);
-
-    this.render(
-      `<FooBar @hash={{hash firstName="Godfrey"}} as |values|>{{values.firstName}} {{values.lastName}}</FooBar>`
-    );
-
-    this.assertHTML('Godfrey Chan');
-    this.assertStableRerender();
-
-    assert.validateDeprecations(
-      /You set the 'lastName' property on a \{\{hash\}\} object. Setting properties on objects generated by \{\{hash\}\} is deprecated. Please update to use an object created with a tracked property or getter, or with a custom helper./u
-    );
-  }
 }
 
 jitSuite(HashTest);
diff --git a/packages/@glimmer/runtime/lib/helpers/hash.ts b/packages/@glimmer/runtime/lib/helpers/hash.ts
index 3dcc77ddb1..0b19c7e87e 100644
--- a/packages/@glimmer/runtime/lib/helpers/hash.ts
+++ b/packages/@glimmer/runtime/lib/helpers/hash.ts
@@ -1,33 +1,10 @@
 import type { CapturedArguments, Dict } from '@glimmer/interfaces';
 import type { Reference } from '@glimmer/reference';
-import { deprecate } from '@glimmer/global-context';
 import { createComputeRef } from '@glimmer/reference';
 
 import { reifyNamed } from '../vm/arguments';
 import { internalHelper } from './internal-helper';
 
-let wrapHashProxy: (hash: Record<string, unknown>) => Record<string, unknown>;
-
-if (import.meta.env.DEV) {
-  wrapHashProxy = (hash: Record<string, unknown>) => {
-    return new Proxy(hash, {
-      set(target, key, value) {
-        deprecate(
-          `You set the '${String(
-            key
-          )}' property on a {{hash}} object. Setting properties on objects generated by {{hash}} is deprecated. Please update to use an object created with a tracked property or getter, or with a custom helper.`,
-          false,
-          { id: 'setting-on-hash' }
-        );
-
-        target[key as string] = value;
-
-        return true;
-      },
-    });
-  };
-}
-
 /**
    Use the `{{hash}}` helper to create a hash to pass as an option to your
    components. This is specially useful for contextual components where you can
@@ -67,13 +44,7 @@ if (import.meta.env.DEV) {
 export const hash = internalHelper(({ named }: CapturedArguments): Reference<Dict<unknown>> => {
   let ref = createComputeRef(
     () => {
-      let hash = reifyNamed(named);
-
-      if (import.meta.env.DEV) {
-        hash = wrapHashProxy(hash);
-      }
-
-      return hash;
+      return reifyNamed(named);
     },
     null,
     'hash'