diff --git a/.gitignore b/.gitignore
index e9e5d20..bb9eace 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ types
 *.log*
 *.env*
 .idea
+.history
diff --git a/src/proxy/_utils.ts b/src/proxy/_utils.ts
index 0132b5b..c65c800 100644
--- a/src/proxy/_utils.ts
+++ b/src/proxy/_utils.ts
@@ -88,7 +88,7 @@ export function literalToAst(value: any, seen = new Set()): ASTNode {
       Object.entries(value).map(([key, value]) => {
         return b.property(
           "init",
-          b.identifier(key),
+          /^[$A-Z_a-z][\w$]*$/g.test(key) ? b.identifier(key) : b.literal(key),
           literalToAst(value, seen) as any
         ) as any;
       })
diff --git a/test/object.test.ts b/test/object.test.ts
index 915843b..7abc09b 100644
--- a/test/object.test.ts
+++ b/test/object.test.ts
@@ -135,4 +135,96 @@ export default {
       };"
     `);
   });
+
+  it("object keys camelCase style", () => {
+    const mod = parseModule(`export default defineAppConfig({
+      test: {
+        foo: 1,
+      }
+    })`);
+
+    const config =
+      mod.exports.default.$type === "function-call"
+        ? mod.exports.default.$args[0]
+        : mod.exports.default;
+
+    const obj1 = { kebabCase: 1 };
+
+    deepMergeObject(config, obj1);
+
+    expect(generate(mod)).toMatchInlineSnapshot(`
+      "export default defineAppConfig({
+        test: {
+          foo: 1,
+        },
+
+        kebabCase: 1,
+      });"
+    `);
+
+    const obj2 = { kebabCaseParent: { kebabCaseChild: 1 } };
+
+    deepMergeObject(config, obj2);
+
+    expect(generate(mod)).toMatchInlineSnapshot(`
+      "export default defineAppConfig({
+        test: {
+          foo: 1,
+        },
+
+        kebabCase: 1,
+
+        kebabCaseParent: {
+          kebabCaseChild: 1,
+        },
+      });"
+    `);
+  });
+
+  it("object keys kebab-case style", () => {
+    const mod = parseModule(`export default defineAppConfig({
+      test: {
+        foo: 1,
+      }
+    })`);
+
+    const config =
+      mod.exports.default.$type === "function-call"
+        ? mod.exports.default.$args[0]
+        : mod.exports.default;
+
+    const obj1 = { "kebab-case": 1 };
+
+    deepMergeObject(config, obj1);
+
+    // Valid
+    expect(generate(mod)).toMatchInlineSnapshot(`
+      "export default defineAppConfig({
+        test: {
+          foo: 1,
+        },
+
+        \\"kebab-case\\": 1,
+      });"
+    `);
+
+    const obj2 = { "kebab-case-parent": { "kebab-case-child": 1 } };
+
+    deepMergeObject(config, obj2);
+
+    // TODO: Should be valid
+    expect(generate(mod)).toMatchInlineSnapshot(`
+      "export default defineAppConfig({
+        test: {
+          foo: 1,
+        },
+
+        \\"kebab-case\\": 1,
+
+        \\"kebab-case-parent\\": {
+          \\"kebab-case-child\\": 1,
+        },
+      });"
+    `);
+  });
 });