diff --git a/src/custom/util.ts b/src/custom/util.ts
index b194de0..e6a1725 100644
--- a/src/custom/util.ts
+++ b/src/custom/util.ts
@@ -57,7 +57,8 @@ export const performAwsIamLogin = async (baseUrl: string, identityId: string, re
 		{
 			service: "sts",
 			path: `/?${body}`,
-			region
+			region,
+			host: `sts.${region}.amazonaws.com`
 		},
 		{
 			accessKeyId: creds.accessKeyId,
@@ -66,8 +67,6 @@ export const performAwsIamLogin = async (baseUrl: string, identityId: string, re
 		}
 	);
 
-	delete signOpts.headers?.host;
-	delete signOpts.headers?.Host;
 	const headers = {
 		...signOpts.headers
 	};