diff --git a/tox.ini b/tox.ini
index 5849dc493..3970e31cd 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,6 +18,9 @@ description = "run tests with pytest"
 usedevelop = true
 extras = dev
 deps =
+# attrs v23.2.0 is needed for mindeps because jsonschema==4.18.0
+# is uses `hash=True` which was deprecated after this version
+    mindeps: attrs==23.2.0
     mindeps: jsonschema==4.18.0
     mindeps: click==8.0.0
     mindeps: requests==2.0.0