diff --git a/pyproject.toml b/pyproject.toml
index 4a2293ea3..b94e7bde0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -54,7 +54,7 @@ requires-python = ">=3.8,<3.11"
 equiv = [
     "lie_learn==0.0.1.post1",
     "escnn~=1.0.7",
-    "py3nj==0.1.3",
+    "py3nj==0.1.2",
     "e3nn~=0.5.1"
 ]
 spharm = [