diff --git a/setup.py b/setup.py
index 24d4479..e31e359 100755
--- a/setup.py
+++ b/setup.py
@@ -39,7 +39,7 @@ setup(
     ],
     install_requires=[
         'msgpack', 'trio>0.8', 'async_generator', 'colorlog', 'wrapt',
-        'trio_typing'
+        'trio_typing', 'pdbpp',
     ],
     tests_require=['pytest'],
     python_requires=">=3.7",