diff --git a/pyproject.toml b/pyproject.toml
index 01d38cd..f7d63fd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -28,7 +28,7 @@ classifiers = [
   "Programming Language :: Python :: 3.11",
 ]
 dependencies = [
-  "capellambse",
+  "capellambse>=0.5,<0.6",
   "click",
 ]