diff --git a/src/core/LambdaWrapper.ts b/src/core/LambdaWrapper.ts
index 15c2238..53ed825 100644
--- a/src/core/LambdaWrapper.ts
+++ b/src/core/LambdaWrapper.ts
@@ -27,7 +27,7 @@ export default class LambdaWrapper<TConfig extends LambdaWrapperConfig = LambdaW
    *
    * @param config
    */
-  configure<TMoreConfig>(config: Partial<TConfig> & TMoreConfig): LambdaWrapper<TConfig & TMoreConfig> {
+  configure<TMoreConfig extends Partial<LambdaWrapperConfig>>(config: Partial<TConfig> & TMoreConfig): LambdaWrapper<TConfig & TMoreConfig> {
     return new LambdaWrapper(mergeConfig(this.config, config));
   }