diff --git a/pandas/core/window/expanding.py b/pandas/core/window/expanding.py
index 7f9dfece959de..d1a8b70b34462 100644
--- a/pandas/core/window/expanding.py
+++ b/pandas/core/window/expanding.py
@@ -127,7 +127,7 @@ def __init__(
         self,
         obj: NDFrame,
         min_periods: int = 1,
-        center=None,
+        center: bool | None = None,
         axis: Axis = 0,
         method: str = "single",
         selection=None,
diff --git a/pandas/core/window/rolling.py b/pandas/core/window/rolling.py
index 4d506fbf896b6..b45f43adbe952 100644
--- a/pandas/core/window/rolling.py
+++ b/pandas/core/window/rolling.py
@@ -122,7 +122,7 @@ def __init__(
         obj: NDFrame,
         window=None,
         min_periods: int | None = None,
-        center: bool = False,
+        center: bool | None = False,
         win_type: str | None = None,
         axis: Axis = 0,
         on: str | Index | None = None,
diff --git a/pyright_reportGeneralTypeIssues.json b/pyright_reportGeneralTypeIssues.json
index ab1782af51260..b43c6a109adbf 100644
--- a/pyright_reportGeneralTypeIssues.json
+++ b/pyright_reportGeneralTypeIssues.json
@@ -85,7 +85,6 @@
         "pandas/core/util/hashing.py",
         "pandas/core/util/numba_.py",
         "pandas/core/window/ewm.py",
-        "pandas/core/window/expanding.py",
         "pandas/core/window/rolling.py",
         "pandas/io/common.py",
         "pandas/io/excel/_base.py",