diff --git a/.ci_support/setup_pyiron.sh b/.ci_support/setup_pyiron.sh
index f458d734d..d8aec32da 100755
--- a/.ci_support/setup_pyiron.sh
+++ b/.ci_support/setup_pyiron.sh
@@ -1,3 +1,3 @@
 #!/bin/bash
-conda install -y -c conda-forge python=${2} future psutil pytables numpy matplotlib scipy sqlalchemy pathlib2 pandas h5py coveralls coverage ase spglib h5io phonopy defusedxml pysqa
+conda install -y -c conda-forge python=${2} future psutil pytables numpy matplotlib scipy sqlalchemy pathlib2 pandas h5py coveralls coverage ase=3.17.0 spglib h5io phonopy defusedxml pysqa
 pip install --pre .