diff --git a/backend/src/services/identity-aws-auth/identity-aws-auth-service.ts b/backend/src/services/identity-aws-auth/identity-aws-auth-service.ts
index fe7b24783..409f63b1e 100644
--- a/backend/src/services/identity-aws-auth/identity-aws-auth-service.ts
+++ b/backend/src/services/identity-aws-auth/identity-aws-auth-service.ts
@@ -94,7 +94,7 @@ export const identityAwsAuthServiceFactory = ({
 
     const headers: TAwsGetCallerIdentityHeaders = JSON.parse(Buffer.from(iamRequestHeaders, "base64").toString());
     const body: string = Buffer.from(iamRequestBody, "base64").toString();
-    const region = headers.Authorization ? awsRegionFromHeader(headers.Authorization) : null;
+    const region = headers.authorization ? awsRegionFromHeader(headers.Authorization || headers.authorization) : null;
 
     if (!isValidAwsRegion(region)) {
       throw new BadRequestError({ message: "Invalid AWS region" });
diff --git a/backend/src/services/identity-aws-auth/identity-aws-auth-types.ts b/backend/src/services/identity-aws-auth/identity-aws-auth-types.ts
index 785b37bbc..9844c8a63 100644
--- a/backend/src/services/identity-aws-auth/identity-aws-auth-types.ts
+++ b/backend/src/services/identity-aws-auth/identity-aws-auth-types.ts
@@ -40,7 +40,8 @@ export type TAwsGetCallerIdentityHeaders = {
   "X-Amz-Date": string;
   "Content-Length": number;
   "x-amz-security-token": string;
-  Authorization: string;
+  Authorization?: string;
+  authorization?: string;
 };
 
 export type TGetCallerIdentityResponse = {