diff --git a/src/api-docs-function.ts b/src/api-docs-function.ts
index d1ab89ea..d62ba2db 100644
--- a/src/api-docs-function.ts
+++ b/src/api-docs-function.ts
@@ -17,10 +17,10 @@ export class ApiDocsFunction extends lambda.Function {
     super(scope, id, {
       description: 'functions/src/api-docs.lambda.ts',
       ...props,
-      runtime: new lambda.Runtime('nodejs18.x', lambda.RuntimeFamily.NODEJS),
+      runtime: new lambda.Runtime('nodejs14.x', lambda.RuntimeFamily.NODEJS),
       handler: 'index.handler',
       code: lambda.Code.fromAsset(path.join(__dirname, '../assets/functions/src/api-docs.lambda')),
     });
     this.addEnvironment('AWS_NODEJS_CONNECTION_REUSE_ENABLED', '1', { removeInEdge: true });
   }
-}
+}
\ No newline at end of file
diff --git a/src/swagger-ui-function.ts b/src/swagger-ui-function.ts
index 16c89e9a..3966e854 100644
--- a/src/swagger-ui-function.ts
+++ b/src/swagger-ui-function.ts
@@ -17,10 +17,10 @@ export class SwaggerUiFunction extends lambda.Function {
     super(scope, id, {
       description: 'functions/src/swagger-ui.lambda.ts',
       ...props,
-      runtime: new lambda.Runtime('nodejs18.x', lambda.RuntimeFamily.NODEJS),
+      runtime: new lambda.Runtime('nodejs14.x', lambda.RuntimeFamily.NODEJS),
       handler: 'index.handler',
       code: lambda.Code.fromAsset(path.join(__dirname, '../assets/functions/src/swagger-ui.lambda')),
     });
     this.addEnvironment('AWS_NODEJS_CONNECTION_REUSE_ENABLED', '1', { removeInEdge: true });
   }
-}
+}
\ No newline at end of file