diff --git a/setup.py b/setup.py
index 8972b3102..d4deca45a 100644
--- a/setup.py
+++ b/setup.py
@@ -49,7 +49,7 @@
         'matplotlib',
         'pyvips',
         # dask packages
-        'dask[dataframe]',
+        'dask[dataframe]<2024.11.0',
         'distributed',
         # large image; for non-linux systems only install the PIL tile source
         # by default.
diff --git a/tox.ini b/tox.ini
index 197bf89aa..2087689d8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,8 +19,8 @@ setenv =
 deps =
   coverage
   pooch
-  pytest>=3.6
-  pytest-cov>=2.6
+  pytest
+  pytest-cov
   pytest-xdist
   -rrequirements-dev.txt
 allowlist_externals =