diff --git a/services/ske/oas_commit b/services/ske/oas_commit
index 6ba71f50d..aa9ae6bd9 100644
--- a/services/ske/oas_commit
+++ b/services/ske/oas_commit
@@ -1 +1 @@
-d2755fb2bda0e2105f920af64d7176d184b2bcb7
+c4beb10838a63f2e45612a1a762f13184034a638
diff --git a/services/ske/src/stackit/ske/api/default_api.py b/services/ske/src/stackit/ske/api/default_api.py
index bc98e7451..a6ddd80f8 100644
--- a/services/ske/src/stackit/ske/api/default_api.py
+++ b/services/ske/src/stackit/ske/api/default_api.py
@@ -609,7 +609,12 @@ def create_or_update_cluster(
         self,
         project_id: StrictStr,
         region: StrictStr,
-        cluster_name: StrictStr,
+        cluster_name: Annotated[
+            StrictStr,
+            Field(
+                description="Use lowercase alphanumeric characters or -, must start and end with an alphanumeric character, and be between 1 and 11 characters long."
+            ),
+        ],
         create_or_update_cluster_payload: CreateOrUpdateClusterPayload,
         _request_timeout: Union[
             None,
@@ -629,7 +634,7 @@ def create_or_update_cluster(
         :type project_id: str
         :param region: (required)
         :type region: str
-        :param cluster_name: (required)
+        :param cluster_name: Use lowercase alphanumeric characters or -, must start and end with an alphanumeric character, and be between 1 and 11 characters long. (required)
         :type cluster_name: str
         :param create_or_update_cluster_payload: (required)
         :type create_or_update_cluster_payload: CreateOrUpdateClusterPayload
@@ -684,7 +689,12 @@ def create_or_update_cluster_with_http_info(
         self,
         project_id: StrictStr,
         region: StrictStr,
-        cluster_name: StrictStr,
+        cluster_name: Annotated[
+            StrictStr,
+            Field(
+                description="Use lowercase alphanumeric characters or -, must start and end with an alphanumeric character, and be between 1 and 11 characters long."
+            ),
+        ],
         create_or_update_cluster_payload: CreateOrUpdateClusterPayload,
         _request_timeout: Union[
             None,
@@ -704,7 +714,7 @@ def create_or_update_cluster_with_http_info(
         :type project_id: str
         :param region: (required)
         :type region: str
-        :param cluster_name: (required)
+        :param cluster_name: Use lowercase alphanumeric characters or -, must start and end with an alphanumeric character, and be between 1 and 11 characters long. (required)
         :type cluster_name: str
         :param create_or_update_cluster_payload: (required)
         :type create_or_update_cluster_payload: CreateOrUpdateClusterPayload
@@ -759,7 +769,12 @@ def create_or_update_cluster_without_preload_content(
         self,
         project_id: StrictStr,
         region: StrictStr,
-        cluster_name: StrictStr,
+        cluster_name: Annotated[
+            StrictStr,
+            Field(
+                description="Use lowercase alphanumeric characters or -, must start and end with an alphanumeric character, and be between 1 and 11 characters long."
+            ),
+        ],
         create_or_update_cluster_payload: CreateOrUpdateClusterPayload,
         _request_timeout: Union[
             None,
@@ -779,7 +794,7 @@ def create_or_update_cluster_without_preload_content(
         :type project_id: str
         :param region: (required)
         :type region: str
-        :param cluster_name: (required)
+        :param cluster_name: Use lowercase alphanumeric characters or -, must start and end with an alphanumeric character, and be between 1 and 11 characters long. (required)
         :type cluster_name: str
         :param create_or_update_cluster_payload: (required)
         :type create_or_update_cluster_payload: CreateOrUpdateClusterPayload
diff --git a/services/ske/src/stackit/ske/models/cluster.py b/services/ske/src/stackit/ske/models/cluster.py
index 5bfbbd603..b6680d33e 100644
--- a/services/ske/src/stackit/ske/models/cluster.py
+++ b/services/ske/src/stackit/ske/models/cluster.py
@@ -15,9 +15,10 @@
 
 import json
 import pprint
+import re  # noqa: F401
 from typing import Any, ClassVar, Dict, List, Optional, Set
 
-from pydantic import BaseModel, ConfigDict, Field, StrictStr
+from pydantic import BaseModel, ConfigDict, Field, field_validator
 from pydantic_core import to_jsonable_python
 from typing_extensions import Annotated, Self
 
@@ -41,7 +42,10 @@ class Cluster(BaseModel):
     hibernation: Optional[Hibernation] = None
     kubernetes: Kubernetes
     maintenance: Optional[Maintenance] = None
-    name: Optional[StrictStr] = None
+    name: Optional[Annotated[str, Field(min_length=1, strict=True, max_length=11)]] = Field(
+        default=None,
+        description="Use lowercase alphanumeric characters or -, must start and end with an alphanumeric character, and be between 1 and 11 characters long.",
+    )
     network: Optional[Network] = None
     nodepools: Annotated[List[Nodepool], Field(min_length=1, max_length=50)]
     status: Optional[ClusterStatus] = None
@@ -57,6 +61,19 @@ class Cluster(BaseModel):
         "status",
     ]
 
+    @field_validator("name")
+    def name_validate_regular_expression(cls, value):
+        """Validates the regular expression"""
+        if value is None:
+            return value
+
+        if not isinstance(value, str):
+            value = str(value)
+
+        if not re.match(r"^[a-z0-9]([a-z0-9-]{0,9}[a-z0-9])?$", value):
+            raise ValueError(r"must validate the regular expression /^[a-z0-9]([a-z0-9-]{0,9}[a-z0-9])?$/")
+        return value
+
     model_config = ConfigDict(
         validate_by_name=True,
         validate_by_alias=True,