diff --git a/src/compwa_policy/check_dev_files/ty.py b/src/compwa_policy/check_dev_files/ty.py
index efc4da3e..1e78f411 100644
--- a/src/compwa_policy/check_dev_files/ty.py
+++ b/src/compwa_policy/check_dev_files/ty.py
@@ -8,6 +8,7 @@
 from ruamel.yaml.comments import CommentedSeq
 
 from compwa_policy.utilities import vscode
+from compwa_policy.utilities.precommit.getters import find_hook
 from compwa_policy.utilities.precommit.struct import Hook, Repo
 from compwa_policy.utilities.pyproject import ModifiablePyproject
 from compwa_policy.utilities.readme import add_badge, remove_badge
@@ -91,6 +92,11 @@ def _update_precommit_config(precommit: ModifiablePrecommit) -> None:
         language="system",
         types_or=types_or,
     )
+    existing_hook = find_hook(precommit.document, r"^ty$")
+    if existing_hook:
+        exclude = existing_hook.get("exclude")
+        if exclude:
+            hook["exclude"] = exclude
     expected_repo = Repo(repo="local", hooks=[hook])
     precommit.update_single_hook_repo(expected_repo)
 
diff --git a/src/compwa_policy/utilities/precommit/getters.py b/src/compwa_policy/utilities/precommit/getters.py
index f14b3fce..7823e050 100644
--- a/src/compwa_policy/utilities/precommit/getters.py
+++ b/src/compwa_policy/utilities/precommit/getters.py
@@ -5,7 +5,18 @@
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
-    from compwa_policy.utilities.precommit.struct import PrecommitConfig, Repo
+    from compwa_policy.utilities.precommit.struct import Hook, PrecommitConfig, Repo
+
+
+def find_hook(config: PrecommitConfig, search_pattern: str) -> Hook | None:
+    """Find pre-commit hook definition in pre-commit config."""
+    repos = config.get("repos", [])
+    for repo in repos:
+        hooks = repo.get("hooks", [])
+        for hook in hooks:
+            if re.search(search_pattern, hook.get("id", "")):
+                return hook
+    return None
 
 
 def find_repo(config: PrecommitConfig, search_pattern: str) -> Repo | None: