diff --git a/pyproject.toml b/pyproject.toml
index 63c28b60..3c351ce9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -16,7 +16,7 @@ numpy = "^1.26"
 tqdm = "^4.66"
 pymongo = "^4.7.3"
 matplotlib = "^3.9"
-ase = "^3.23"
+ase = "3.22.1"
 lark = "^1.1.9"
 
 [tool.poetry.group.dev.dependencies]