diff --git a/pyproject.toml b/pyproject.toml
index 857aa53..8df60e4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,7 +41,7 @@ Issues = "https://github.com/datex2-tools/schema2classes/issues"
 
 [dependency-groups]
 dev = [
-    "validataclass~=0.11.0",
+    "validataclass>=0.11,<0.13",
     "pydantic[email]>=2.0",
     "pytest~=9.0.2",
     "pytest-cov~=7.1.0",