diff --git a/automation/taskcluster/windows/build_gyp.sh b/automation/taskcluster/windows/build_gyp.sh
index 1a78d44a7b..1621c25710 100644
--- a/automation/taskcluster/windows/build_gyp.sh
+++ b/automation/taskcluster/windows/build_gyp.sh
@@ -19,7 +19,7 @@ pushd gyp
 python -m virtualenv test-env
 test-env/Scripts/python setup.py install
 test-env/Scripts/python -m pip install --upgrade pip
-test-env/Scripts/pip install --upgrade setuptools
+test-env/Scripts/pip install --upgrade 'setuptools<45.0.0'
 # Fool GYP.
 touch "${VSPATH}/VC/vcvarsall.bat"
 export GYP_MSVS_OVERRIDE_PATH="${VSPATH}"