diff --git a/pySDC/projects/AllenCahn_Bayreuth/environment.yml b/pySDC/projects/AllenCahn_Bayreuth/environment.yml
index 282adb5b8350629e5c69320475317ebf313d1b32..79f58ee369d0dee5f00c9a85360f50b3f801bcd5 100644
--- a/pySDC/projects/AllenCahn_Bayreuth/environment.yml
+++ b/pySDC/projects/AllenCahn_Bayreuth/environment.yml
@@ -4,6 +4,7 @@ name: pySDC
 channels:
   - conda-forge
 dependencies:
+  - mpich
   - mpi4py>=3.0.0
   - mpi4py-fft>=2.0.2
   - matplotlib>=3.0
diff --git a/pySDC/projects/SDC_showdown/environment.yml b/pySDC/projects/SDC_showdown/environment.yml
index df15f237cc8a8325af6e4538f6bf79c3a7554399..fc268e8547517f70ae8dbb952799f98492e9820d 100644
--- a/pySDC/projects/SDC_showdown/environment.yml
+++ b/pySDC/projects/SDC_showdown/environment.yml
@@ -4,6 +4,7 @@ name: pySDC
 channels:
   - conda-forge
 dependencies:
+  - mpich
   - petsc4py
   - matplotlib>=3.0
   - dill>=0.2.6