diff --git a/castai/resource_autoscaler.go b/castai/resource_autoscaler.go
index 46647708..7a91b458 100644
--- a/castai/resource_autoscaler.go
+++ b/castai/resource_autoscaler.go
@@ -269,14 +269,14 @@ func resourceAutoscaler() *schema.Resource {
 													Optional:         true,
 													Default:          1,
 													Description:      "defines the minimum allowed amount of CPUs in the whole cluster.",
-													ValidateDiagFunc: validation.ToDiagFunc(validation.IntBetween(1, 20)),
+													ValidateDiagFunc: validation.ToDiagFunc(validation.IntAtLeast(1)),
 												},
 												FieldMaxCores: {
 													Type:             schema.TypeInt,
 													Optional:         true,
 													Default:          20,
 													Description:      "defines the maximum allowed amount of vCPUs in the whole cluster.",
-													ValidateDiagFunc: validation.ToDiagFunc(validation.IntBetween(2, 1000)),
+													ValidateDiagFunc: validation.ToDiagFunc(validation.IntAtLeast(2)),
 												},
 											},
 										},