diff --git a/spack-environment/dev/spack.yaml b/spack-environment/dev/spack.yaml
index dcff7e367905e2b47449d759a69d9d1193617757..0d7473ee3eef8bba1cfe56039ac4a46ad0f4caa6 100644
--- a/spack-environment/dev/spack.yaml
+++ b/spack-environment/dev/spack.yaml
@@ -67,6 +67,7 @@ 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 a8e9dcbf96ea82b6fbdac5fe018a89e7bfaa926e..f359664fb879edf75cef84f7bb23eb3a1db7d46a 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -279,6 +279,9 @@ packages:
   py-numpy:
     require:
     - '@1.26.1'
+  py-onnx:
+    require:
+    - '@1.13.1'
   py-pandas:
     require:
     - '@1.5.3'