diff --git a/etc/environment-petsc.yml b/etc/environment-petsc.yml
index 05ac79497c..7b5b4f3900 100644
--- a/etc/environment-petsc.yml
+++ b/etc/environment-petsc.yml
@@ -8,9 +8,9 @@ dependencies:
   - matplotlib>=3.0
   - dill>=0.2.6
   - mpich
-  - petsc4py>=3.10.0
+  - petsc4py<3.20
   - mpi4py>=3.0.0
   - pytest
   - pytest-cov
   - pytest-timeout
-  - pytest-order
\ No newline at end of file
+  - pytest-order