diff --git a/lib/plugins/aws/deploy/compile/events/apiGateway/lib/authorizers.js b/lib/plugins/aws/deploy/compile/events/apiGateway/lib/authorizers.js
index 16846755f..e78943f8e 100644
--- a/lib/plugins/aws/deploy/compile/events/apiGateway/lib/authorizers.js
+++ b/lib/plugins/aws/deploy/compile/events/apiGateway/lib/authorizers.js
@@ -51,7 +51,8 @@ module.exports = {
               throw new this.serverless.classes
                 .Error('Please provide either an authorizer name or ARN');
             }
-            resultTtlInSeconds = Number.parseInt(authorizer.resultTtlInSeconds, 10) || 300;
+            resultTtlInSeconds = Number.parseInt(authorizer.resultTtlInSeconds, 10);
+            resultTtlInSeconds = Number.isNaN(resultTtlInSeconds) ? 300 : resultTtlInSeconds;
             identitySource = authorizer.identitySource || 'method.request.header.Authorization';
           } else {
             const errorMessage = [
diff --git a/lib/plugins/aws/deploy/compile/events/apiGateway/tests/authorizers.js b/lib/plugins/aws/deploy/compile/events/apiGateway/tests/authorizers.js
index 75eea0e00..6648a55de 100644
--- a/lib/plugins/aws/deploy/compile/events/apiGateway/tests/authorizers.js
+++ b/lib/plugins/aws/deploy/compile/events/apiGateway/tests/authorizers.js
@@ -108,7 +108,7 @@ describe('#compileAuthorizers()', () => {
   it('should create authorizer with the given config object', () => {
     awsCompileApigEvents.serverless.service.functions.first.events[0].http.authorizer = {
       name: 'authorizer',
-      resultTtlInSeconds: 400,
+      resultTtlInSeconds: 0,
       identitySource: 'method.request.header.Custom',
       identityValidationExpression: 'regex',
     };
@@ -117,7 +117,7 @@ describe('#compileAuthorizers()', () => {
       expect(
         awsCompileApigEvents.serverless.service.provider.compiledCloudFormationTemplate
           .Resources.AuthorizerApiGatewayAuthorizer.Properties.AuthorizerResultTtlInSeconds
-      ).to.equal(400);
+      ).to.equal(0);
 
       expect(
         awsCompileApigEvents.serverless.service.provider.compiledCloudFormationTemplate