diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index f0b033f3..22f21130 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -8,7 +8,7 @@ repos:
       - id: trailing-whitespace
 
   - repo: https://github.com/pre-commit/mirrors-mypy
-    rev: v0.950
+    rev: v0.991
     hooks:
       - id: mypy
         exclude: '^(docs|tasks|tests)|setup\.py'
diff --git a/src/packaging/specifiers.py b/src/packaging/specifiers.py
index e715ecc8..8f1e181f 100644
--- a/src/packaging/specifiers.py
+++ b/src/packaging/specifiers.py
@@ -252,7 +252,8 @@ def __init__(self, spec: str = "", prereleases: Optional[bool] = None) -> None:
         # Store whether or not this Specifier should accept prereleases
         self._prereleases = prereleases
 
-    @property
+    # https://github.com/python/mypy/pull/13475#pullrequestreview-1079784515
+    @property  # type: ignore[override]
     def prereleases(self) -> bool:
         # If there is an explicit prereleases set for this, then we'll just
         # blindly use that.
diff --git a/src/packaging/tags.py b/src/packaging/tags.py
index 19ccbde3..14bf982b 100644
--- a/src/packaging/tags.py
+++ b/src/packaging/tags.py
@@ -111,7 +111,7 @@ def parse_tag(tag: str) -> FrozenSet[Tag]:
 
 
 def _get_config_var(name: str, warn: bool = False) -> Union[int, str, None]:
-    value = sysconfig.get_config_var(name)
+    value: Union[int, str, None] = sysconfig.get_config_var(name)
     if value is None and warn:
         logger.debug(
             "Config variable '%s' is unset, Python ABI tag may be incorrect", name