diff --git a/step-ca/ca.json b/step-ca/ca.json
index 41fe141..9623ecc 100644
--- a/step-ca/ca.json
+++ b/step-ca/ca.json
@@ -25,7 +25,11 @@
 		"provisioners": [
 			{
 				"type": "ACME",
-				"name": "acme"
+				"name": "acme",
+				"claims": {
+					"maxTLSCertDuration": "744h",
+					"defaultTLSCertDuration": "168h"
+				}
 			},
 			{
 				"type": "OIDC",