diff --git a/types/aws-lambda/aws-lambda-tests.ts b/types/aws-lambda/aws-lambda-tests.ts
index f4f97ccfc4..dc16eca58f 100644
--- a/types/aws-lambda/aws-lambda-tests.ts
+++ b/types/aws-lambda/aws-lambda-tests.ts
@@ -260,9 +260,27 @@ statement = {
 };
 
 statement = {
+    Sid: str,
     Action: [str, str],
     Effect: str,
-    Resource: [str, str]
+    Resource: [str, str],
+    Condition: {
+        condition1: { key: "value" },
+        condition2: [{
+                key1: "value",
+                key2: "value"
+        }, {
+            key3: "value"
+        }]
+    },
+    Principal: [str, str],
+    NotPrincipal: [str, str]
+};
+
+statement = {
+    Effect: str,
+    NotAction: str,
+    NotResource: str
 };
 
 policyDocument = {
@@ -270,6 +288,11 @@ policyDocument = {
     Statement: [statement]
 };
 
+policyDocument = {
+    Version: str,
+    Statement: [statement, statement]
+};
+
 authResponse = {
     principalId: str,
     policyDocument,
diff --git a/types/aws-lambda/index.d.ts b/types/aws-lambda/index.d.ts
index bd108fa2a5..c060bc10ee 100644
--- a/types/aws-lambda/index.d.ts
+++ b/types/aws-lambda/index.d.ts
@@ -17,6 +17,7 @@
 //                 Simon Buchan <https://github.com/simonbuchan>
 //                 David Hayden <https://github.com/Haydabase>
 //                 Chris Redekop <https://github.com/repl-chris>
+//                 Aneil Mallavarapu <https://github.com/aneilbaboo>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.3
 
@@ -438,28 +439,52 @@ export interface CustomAuthorizerResult {
     principalId: string;
     policyDocument: PolicyDocument;
     context?: AuthResponseContext;
+    usageIdentifierKey?: string;
 }
 export type AuthResponse = CustomAuthorizerResult;
 
 /**
  * API Gateway CustomAuthorizer AuthResponse.PolicyDocument.
- * http://docs.aws.amazon.com/apigateway/latest/developerguide/use-custom-authorizer.html#api-gateway-custom-authorizer-output
+ * https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-lambda-authorizer-output.html
+ * https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements.html#Condition
  */
 export interface PolicyDocument {
     Version: string;
-    Statement: [Statement];
+    Id?: string;
+    Statement: Statement[];
+}
+
+/**
+ * API Gateway CustomAuthorizer AuthResponse.PolicyDocument.Condition.
+ * https://docs.aws.amazon.com/apigateway/latest/developerguide/apigateway-control-access-policy-language-overview.html
+ * https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements_condition.html
+ */
+export interface ConditionBlock {
+    [condition: string]: Condition | Condition[];
+}
+
+export interface Condition {
+    [key: string]: string | string[];
 }
 
 /**
  * API Gateway CustomAuthorizer AuthResponse.PolicyDocument.Statement.
- * http://docs.aws.amazon.com/apigateway/latest/developerguide/use-custom-authorizer.html#api-gateway-custom-authorizer-output
+ * https://docs.aws.amazon.com/apigateway/latest/developerguide/apigateway-control-access-policy-language-overview.html
+ * https://docs.aws.amazon.com/IAM/latest/UserGuide/reference_policies_elements.html
  */
-export interface Statement {
-    Action: string | string[];
+export type Statement = BaseStatement & StatementAction & StatementResource;
+
+export interface BaseStatement {
     Effect: string;
-    Resource: string | string[];
+    Sid?: string;
+    Condition?: ConditionBlock;
+    Principal?: string | string[];
+    NotPrincipal?: string | string[];
 }
 
+export type StatementAction = { Action: string | string[] } | { NotAction: string | string[] };
+export type StatementResource = { Resource: string | string[] } | { NotResource: string | string[] };
+
 /**
  * API Gateway CustomAuthorizer AuthResponse.PolicyDocument.Statement.
  * http://docs.aws.amazon.com/apigateway/latest/developerguide/use-custom-authorizer.html#api-gateway-custom-authorizer-output