diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 6e84925..da11a5d 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       matrix:
         node-version: [14.x, 16.x, 18.x]
-        ts-version: [4.4.x, 4.5.x, 4.6.x, 4.7.x]
+        ts-version: [4.4.x, 4.5.x, 4.6.x, 4.7.x, 4.8.x]
         react-version: ['16.14.0', 16.x, 17.x, 18.x]
     runs-on: ubuntu-latest
     steps:
diff --git a/src/reactive/ObjectDeps.ts b/src/reactive/ObjectDeps.ts
index 400df2e..4037e9b 100644
--- a/src/reactive/ObjectDeps.ts
+++ b/src/reactive/ObjectDeps.ts
@@ -35,7 +35,7 @@ export class ObjectDeps<T = any> implements Deps {
     return this.model + '.' + this.deps.join('.');
   }
 
-  start<T>(startState: T): T {
+  start<T extends Record<string, any>>(startState: T): T {
     depsCollector.append(this);
     return this.proxy(startState);
   }