diff --git a/CHANGELOG.md b/CHANGELOG.md
index b50d4e2da..2b9f6d664 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -50,6 +50,9 @@
     - **Breaking Change/Fix:** `create_backup` operation now returns `CreateBackupResponseItem` instead of `List[CreateBackupResponseItem]`
       The return type now correctly models the actual JSON response, this operation was broken beforehand.
     - **Deprecation:** Redis service has been deprecated and will be removed after 2027-08-25. Please use the Key Value Store (valkey) service instead.
+- `resourcemanager`
+  - [v0.10.0](services/resourcemanager/CHANGELOG.md#0100)
+    - **Breaking change:** Labels are nullable now, therefore the `labels` attribute in the `PartialUpdateFolderPayload`, `PartialUpdateOrganizationPayload` and `PartialUpdateProjectPayload` model class changed from `Optional[Dict[str, StrictStr]]` to `Optional[Dict[str, Optional[StrictStr]]]`
 - `secretsmanager`:
   - [v0.7.0](services/secretsmanager/CHANGELOG.md#v070)
     - **Feature:** Add support for managing AppRoles and their secret IDs: new `Approle`, `ApproleList`, `ApproleSecret`, `ApproleSecretList`, `CreateApprolePayload`, `CreateApproleSecretIdPayload`, `UpdateApprolePayload` and `UpdateApproleSecretIdPayload` models, plus new `create_approle`, `get_approle`, `get_approles`, `update_approle`, `delete_approle`, `create_approle_secret_id`, `get_approle_secret_id`, `list_approle_secret_ids`, `update_approle_secret_id` and `delete_approle_secret_id` operations
diff --git a/services/resourcemanager/CHANGELOG.md b/services/resourcemanager/CHANGELOG.md
index 3e5af0b3a..1507f17da 100644
--- a/services/resourcemanager/CHANGELOG.md
+++ b/services/resourcemanager/CHANGELOG.md
@@ -1,3 +1,6 @@
+## v0.10.0
+- **Breaking change:** Labels are nullable now, therefore the `labels` attribute in the `PartialUpdateFolderPayload`, `PartialUpdateOrganizationPayload` and `PartialUpdateProjectPayload` model class changed from `Optional[Dict[str, StrictStr]]` to `Optional[Dict[str, Optional[StrictStr]]]`
+
 ## v0.9.1
 - Update description of the `labels` attribute in model classes
 
diff --git a/services/resourcemanager/oas_commit b/services/resourcemanager/oas_commit
index b687a3969..42d3f2f4f 100644
--- a/services/resourcemanager/oas_commit
+++ b/services/resourcemanager/oas_commit
@@ -1 +1 @@
-f22dd14374388602d895c8892b3e5b110dc16582
+79a99bf8bc8175f2f384c7636da1fae5f6a9bd60
diff --git a/services/resourcemanager/pyproject.toml b/services/resourcemanager/pyproject.toml
index 23186d46f..0299c8a52 100644
--- a/services/resourcemanager/pyproject.toml
+++ b/services/resourcemanager/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "stackit-resourcemanager"
-version = "v0.9.1"
+version = "v0.10.0"
 description = "Resource Manager API"
 authors = [{ name = "STACKIT Developer Tools", email = "developer-tools@stackit.cloud" }]
 requires-python = ">=3.10,<4.0"
diff --git a/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_folder_payload.py b/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_folder_payload.py
index 2a148b269..4dd64595c 100644
--- a/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_folder_payload.py
+++ b/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_folder_payload.py
@@ -33,9 +33,9 @@ class PartialUpdateFolderPayload(BaseModel):
         description="New parent identifier for the resource container - containerId as well as UUID identifier is supported.",
         alias="containerParentId",
     )
-    labels: Optional[Dict[str, StrictStr]] = Field(
+    labels: Optional[Dict[str, Optional[StrictStr]]] = Field(
         default=None,
-        description="Key-value string pairs attached to an existing resource container. Certain labels may be enforced via organizational policies.  * **Key:** Must match the regex `[A-ZÄÜÖa-zäüöß0-9_-]{1,64}` * **Value:** Must match the regex `^$|[A-ZÄÜÖa-zäüöß0-9_-]{1,64}`  > Note: Additional naming restrictions may apply depending on your specific organization.*",
+        description="Key-value string pairs attached to an existing resource container. Certain labels may be enforced via organizational policies.  Setting an individual label's value to `null` removes/deletes that label from the resource.  * **Key:** Must match the regex `[A-ZÄÜÖa-zäüöß0-9_-]{1,64}` * **Value:** Must match the regex `^$|[A-ZÄÜÖa-zäüöß0-9_-]{1,64}`, or be `null` to delete the label  > Note: Additional naming restrictions may apply depending on your specific organization.*",
     )
     name: Optional[Annotated[str, Field(strict=True)]] = Field(
         default=None,
diff --git a/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_organization_payload.py b/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_organization_payload.py
index bf1744e27..7041404b8 100644
--- a/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_organization_payload.py
+++ b/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_organization_payload.py
@@ -28,9 +28,9 @@ class PartialUpdateOrganizationPayload(BaseModel):
     PartialUpdateOrganizationPayload
     """  # noqa: E501
 
-    labels: Optional[Dict[str, StrictStr]] = Field(
+    labels: Optional[Dict[str, Optional[StrictStr]]] = Field(
         default=None,
-        description="Key-value string pairs attached to an existing resource container. Certain labels may be enforced via organizational policies.  * **Key:** Must match the regex `[A-ZÄÜÖa-zäüöß0-9_-]{1,64}` * **Value:** Must match the regex `^$|[A-ZÄÜÖa-zäüöß0-9_-]{1,64}`  > Note: Additional naming restrictions may apply depending on your specific organization.*",
+        description="Key-value string pairs attached to an existing resource container. Certain labels may be enforced via organizational policies.  Setting an individual label's value to `null` removes/deletes that label from the resource.  * **Key:** Must match the regex `[A-ZÄÜÖa-zäüöß0-9_-]{1,64}` * **Value:** Must match the regex `^$|[A-ZÄÜÖa-zäüöß0-9_-]{1,64}`, or be `null` to delete the label  > Note: Additional naming restrictions may apply depending on your specific organization.*",
     )
     name: Optional[Annotated[str, Field(strict=True)]] = Field(
         default=None,
diff --git a/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_project_payload.py b/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_project_payload.py
index e78b03157..1df33cd1c 100644
--- a/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_project_payload.py
+++ b/services/resourcemanager/src/stackit/resourcemanager/models/partial_update_project_payload.py
@@ -33,9 +33,9 @@ class PartialUpdateProjectPayload(BaseModel):
         description="New parent identifier for the resource container - containerId as well as UUID identifier is supported.",
         alias="containerParentId",
     )
-    labels: Optional[Dict[str, StrictStr]] = Field(
+    labels: Optional[Dict[str, Optional[StrictStr]]] = Field(
         default=None,
-        description="Key-value string pairs attached to an existing resource container. Certain labels may be enforced via organizational policies.  * **Key:** Must match the regex `[A-ZÄÜÖa-zäüöß0-9_-]{1,64}` * **Value:** Must match the regex `^$|[A-ZÄÜÖa-zäüöß0-9_-]{1,64}`  > Note: Additional naming restrictions may apply depending on your specific organization.*",
+        description="Key-value string pairs attached to an existing resource container. Certain labels may be enforced via organizational policies.  Setting an individual label's value to `null` removes/deletes that label from the resource.  * **Key:** Must match the regex `[A-ZÄÜÖa-zäüöß0-9_-]{1,64}` * **Value:** Must match the regex `^$|[A-ZÄÜÖa-zäüöß0-9_-]{1,64}`, or be `null` to delete the label  > Note: Additional naming restrictions may apply depending on your specific organization.*",
     )
     name: Optional[Annotated[str, Field(strict=True)]] = Field(
         default=None,
diff --git a/services/resourcemanager/uv.lock b/services/resourcemanager/uv.lock
index 388c908e9..deea462df 100644
--- a/services/resourcemanager/uv.lock
+++ b/services/resourcemanager/uv.lock
@@ -1057,7 +1057,7 @@ dev = [
 
 [[package]]
 name = "stackit-resourcemanager"
-version = "0.9.1"
+version = "0.10.0"
 source = { editable = "." }
 dependencies = [
     { name = "pydantic" },