diff --git a/setup.py b/setup.py
index 3aa1b96..2de164f 100755
--- a/setup.py
+++ b/setup.py
@@ -54,7 +54,10 @@ setup(
         # tooling
         'colorlog',
         'wrapt',
-        'pdbpp',
+
+        # 3.10 has an outstanding unreleased issue and `pdbpp` itself
+        # pins to patched forks of its own dependencies as well.
+        "pdbpp @ git+https://github.com/pdbpp/pdbpp@master#egg=pdbpp",  # noqa: E501
 
         # serialization
         'msgpack>=1.0.3',