diff --git a/pyproject.toml b/pyproject.toml
index aa3a41befd..c2920ff4d3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,6 +51,8 @@ dev = [
     "pytest-mock",
     "pytest-integration",
     "tensorboard",
+    # Pin urllib3 to avoid transient error from https://github.com/psf/requests/issues/6443
+    "urllib3<2.0.0",
     "wandb",
     "expecttest",
 ]