diff --git a/setup.py b/setup.py
index fc69a3876..29dbe3418 100644
--- a/setup.py
+++ b/setup.py
@@ -7,7 +7,9 @@
     'fabio>=0.11',
     'matplotlib',
     'Pillow',
-    'pyside6',
+    # PySide 6.8.0 is causing segmentation faults in the testing
+    # Keep this version downgraded until that is fixed.
+    'pyside6<6.8.0',
     'pyyaml',
     'silx',
 ]