diff --git a/.appveyor.yml b/.appveyor.yml
index 6deba8d38d..1d5a29b27b 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -111,7 +111,7 @@ install:
   - cmd: conda config --add channels conda-forge
 
   # Configure the VM.
-  - cmd: conda install -n root --quiet --yes cmake hdf5 numpy
+  - cmd: conda install -n root --quiet --yes -c conda-forge conda-forge::numpy cmake hdf5
 
 before_build:
   - cmd: cd C:\projects\openpmd-api