diff --git a/etc/dev-env.yml b/etc/dev-env.yml
index 4e4d08f..2edfc46 100644
--- a/etc/dev-env.yml
+++ b/etc/dev-env.yml
@@ -5,10 +5,12 @@ dependencies:
   - anaconda-client
   - conda-build
   - doxygen 
-  - sphinx=7.1.2 
+  - sphinx
   - breathe 
   - sphinx_rtd_theme 
   - furo 
   - zeromq 
   - pybind11
+  - numpy
+  - matplotlib