diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 53e784cdf..bc37ad78a 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -56,6 +56,7 @@ repos:
           - fastapi
           - pydantic
           - sqlalchemy
+          - capellambse==0.5.35.dev4
   - repo: local
     hooks:
       - id: pylint
diff --git a/backend/capellacollab/projects/toolmodels/modelsources/git/handler/handler.py b/backend/capellacollab/projects/toolmodels/modelsources/git/handler/handler.py
index 06f9ac632..b835d9f26 100644
--- a/backend/capellacollab/projects/toolmodels/modelsources/git/handler/handler.py
+++ b/backend/capellacollab/projects/toolmodels/modelsources/git/handler/handler.py
@@ -1,19 +1,23 @@
 # SPDX-FileCopyrightText: Copyright DB Netz AG and the capella-collab-manager contributors
 # SPDX-License-Identifier: Apache-2.0
 
+from __future__ import annotations
+
 import abc
 import datetime
 import json
 import typing as t
 
 import requests
-from capellambse import diagram_cache
 
 import capellacollab.projects.toolmodels.modelsources.git.models as git_models
 import capellacollab.settings.modelsources.git.models as settings_git_models
 
 from .. import exceptions
 
+if t.TYPE_CHECKING:
+    from capellambse import diagram_cache
+
 
 class GitHandler:
     def __init__(
diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 7d24ea5b9..3c769b627 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -27,7 +27,6 @@ dependencies = [
   "alembic==1.10.4",
   "appdirs",
   "cachetools",
-  "capellambse==0.5.35.dev4",
   "fastapi>=0.101.0",
   "kubernetes",
   "msal",
@@ -53,6 +52,7 @@ Homepage = "https://github.com/DSD-DBS/capella-collab-manager"
 [project.optional-dependencies]
 dev = [
   "black",
+  "capellambse==0.5.35.dev4",
   "deepdiff",
   "isort",
   "mypy",
@@ -111,7 +111,6 @@ allow_untyped_defs = true
 [[tool.mypy.overrides]]
 # Untyped third party libraries
 module = [
-  "capellambse.*",
   "kubernetes.*",
   "prometheus_client.*",
   "openshift.*",