diff --git a/docs/resources/ske_cluster.md b/docs/resources/ske_cluster.md
index a99d9946..dd901804 100644
--- a/docs/resources/ske_cluster.md
+++ b/docs/resources/ske_cluster.md
@@ -131,9 +131,12 @@ Required:
 
 Required:
 
-- `argus_instance_id` (String) Argus instance ID to choose which Argus instance is used. Required when enabled is set to `true`.
 - `enabled` (Boolean) Flag to enable/disable Argus extensions.
 
+Optional:
+
+- `argus_instance_id` (String) Argus instance ID to choose which Argus instance is used. Required when enabled is set to `true`.
+
 
 <a id="nestedatt--extensions--dns"></a>
 ### Nested Schema for `extensions.dns`
diff --git a/stackit/internal/services/ske/cluster/resource.go b/stackit/internal/services/ske/cluster/resource.go
index 9fc0cf89..12297216 100644
--- a/stackit/internal/services/ske/cluster/resource.go
+++ b/stackit/internal/services/ske/cluster/resource.go
@@ -582,7 +582,7 @@ func (r *clusterResource) Schema(_ context.Context, _ resource.SchemaRequest, re
 							},
 							"argus_instance_id": schema.StringAttribute{
 								Description: "Argus instance ID to choose which Argus instance is used. Required when enabled is set to `true`.",
-								Required:    true,
+								Optional:    true,
 							},
 						},
 					},