diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 89fca0e3..95e8481b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -134,7 +134,7 @@ jobs:
 
         # `setuptools 0.64.0` adds support for editable install hooks (PEP 660).
         # https://github.com/pypa/setuptools/blob/main/CHANGES.rst#v6400
-        pip install "setuptools>=64" --upgrade
+        pip install "setuptools>=64,<70" --upgrade
 
         # Install package in editable mode.
         pip install --use-pep517 --prefer-binary --editable=.[pymongo,test,develop]