diff --git a/terraform/main.tf b/terraform/main.tf
index 4d31ca0..41e4e40 100755
--- a/terraform/main.tf
+++ b/terraform/main.tf
@@ -17,9 +17,9 @@ resource "vault_approle_auth_backend_role" "cert_role" {
   backend        = "approle"
   role_name      = local.approle_name
   token_policies = [vault_policy.cert_access.name]
-  token_ttl      = "1h"
-  token_max_ttl  = "4h"
-  secret_id_ttl  = "24h"
+  token_ttl      = 3600    # 1 hour in seconds
+  token_max_ttl  = 14400   # 4 hours in seconds
+  secret_id_ttl  = 86400   # 24 hours in seconds
 }
 
 resource "vault_approle_auth_backend_role_secret_id" "cert_role_secret" {