diff --git a/setup.py b/setup.py
index bf509e789..bef98aeb9 100644
--- a/setup.py
+++ b/setup.py
@@ -57,7 +57,7 @@
             "pdoc",
             "pre-commit",
             "psutil",  # parallel pytest with '-n auto'
-            "pyright",
+            "pyright==1.1.378",
             "pytest-xdist",  # parallel pytest
             "pytest",
             "python-devtools",