diff --git a/spack-environment/dev/spack.yaml b/spack-environment/dev/spack.yaml
index 73cba0f6b1c16ea101b625ce869c96b6225d4234..91b29572c9fd5afe6c9efa250c849b91d2939246 100644
--- a/spack-environment/dev/spack.yaml
+++ b/spack-environment/dev/spack.yaml
@@ -70,6 +70,7 @@ spack:
   - py-mplhep
   - py-htgettoken
   - py-numpy
+  - py-onnx
   - py-pandas
   - py-pip
   - py-pre-commit
diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 91b81bf1cf61f07db19369e76d689476099428b6..ccd326a55d263aebcda2747c6d662515be88c70a 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -286,6 +286,9 @@ packages:
   py-numpy:
     require:
     - '@1.26.1'
+  py-onnx:
+    require:
+    - '@1.13.1'
   py-pandas:
     require:
     - '@1.5.3'