diff --git a/.changeset/chatty-onions-decide.md b/.changeset/chatty-onions-decide.md
new file mode 100644
index 00000000..b1aec215
--- /dev/null
+++ b/.changeset/chatty-onions-decide.md
@@ -0,0 +1,5 @@
+---
+"@hiogawa/utils": patch
+---
+
+Fix `objectMapValues` mapped type
diff --git a/packages/utils/src/lodash.test.ts b/packages/utils/src/lodash.test.ts
index 2c232568..04d29353 100644
--- a/packages/utils/src/lodash.test.ts
+++ b/packages/utils/src/lodash.test.ts
@@ -468,9 +468,8 @@ describe(`${objectMapValues.name}/${objectMapKeys.name}`, () => {
       const result = objectMapValues(o, (v, k) => (v ? k.repeat(v) : "bad-v"));
       expectTypeOf(result).toEqualTypeOf<{
         x: string;
-        // TODO: these should be optional
-        y: string;
-        z: string;
+        y?: string;
+        z?: string;
       }>();
       expect(result).toMatchInlineSnapshot(`
         {
diff --git a/packages/utils/src/lodash.ts b/packages/utils/src/lodash.ts
index fd217c45..2be10e9c 100644
--- a/packages/utils/src/lodash.ts
+++ b/packages/utils/src/lodash.ts
@@ -314,7 +314,7 @@ function objectMapEntries<T extends object, K2 extends PropertyKey, V2>(
 export function objectMapValues<T extends object, V>(
   o: T,
   f: (v: T[keyof T], k: keyof T) => V
-): Record<keyof T, V> {
+): { [k in keyof T]: V } {
   return objectMapEntries(o, ([k, v]) => [k, f(v, k)]);
 }