diff --git a/CHANGES.rst b/CHANGES.rst
index 58bb3a7..ab6201f 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -6,6 +6,7 @@ Unreleased
 -   Restore identity handling for ``str`` and ``int`` senders. :pr:`148`
 -   Fix deprecated ``blinker.base.WeakNamespace`` import. :pr:`149`
 -   Use types from ``collections.abc`` instead of ``typing``. :pr:`150`
+-   Fully specify exported types as reported by pyright. :pr:`152`
 
 
 Version 1.8.0
diff --git a/src/blinker/base.py b/src/blinker/base.py
index a68efa2..1b802b6 100644
--- a/src/blinker/base.py
+++ b/src/blinker/base.py
@@ -529,7 +529,18 @@ def __repr__(self) -> str:
         return f"{base[:-1]}; {self.name!r}>"  # noqa: E702
 
 
-class Namespace(dict):  # type: ignore[type-arg]
+if t.TYPE_CHECKING:
+
+    class PNamespaceSignal(t.Protocol):
+        def __call__(self, name: str, doc: str | None = None) -> NamedSignal: ...
+
+    # Python < 3.9
+    _NamespaceBase = dict[str, NamedSignal]  # type: ignore[misc]
+else:
+    _NamespaceBase = dict
+
+
+class Namespace(_NamespaceBase):
     """A dict mapping names to signals."""
 
     def signal(self, name: str, doc: str | None = None) -> NamedSignal:
@@ -539,11 +550,10 @@ def signal(self, name: str, doc: str | None = None) -> NamedSignal:
         :param name: The name of the signal.
         :param doc: The docstring of the signal.
         """
-        try:
-            return self[name]  # type: ignore[no-any-return]
-        except KeyError:
-            result = self.setdefault(name, NamedSignal(name, doc))
-            return result  # type: ignore[no-any-return]
+        if name not in self:
+            self[name] = NamedSignal(name, doc)
+
+        return self[name]
 
 
 class _WeakNamespace(WeakValueDictionary):  # type: ignore[type-arg]
@@ -575,19 +585,18 @@ def signal(self, name: str, doc: str | None = None) -> NamedSignal:
         :param name: The name of the signal.
         :param doc: The docstring of the signal.
         """
-        try:
-            return self[name]  # type: ignore[no-any-return]
-        except KeyError:
-            result = self.setdefault(name, NamedSignal(name, doc))
-            return result  # type: ignore[no-any-return]
+        if name not in self:
+            self[name] = NamedSignal(name, doc)
+
+        return self[name]  # type: ignore[no-any-return]
 
 
-default_namespace = Namespace()
+default_namespace: Namespace = Namespace()
 """A default :class:`Namespace` for creating named signals. :func:`signal`
 creates a :class:`NamedSignal` in this namespace.
 """
 
-signal = default_namespace.signal
+signal: PNamespaceSignal = default_namespace.signal
 """Return a :class:`NamedSignal` in :data:`default_namespace` with the given
 ``name``, creating it if required. Repeated calls with the same name return the
 same signal.
diff --git a/tox.ini b/tox.ini
index 6de8000..d1219e5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -24,6 +24,7 @@ deps = -r requirements/typing.txt
 commands =
     mypy
     pyright
+    pyright --verifytypes blinker --ignoreexternal
 
 [testenv:docs]
 deps = -r requirements/docs.txt