diff --git a/CHANGES/6917.bugfix b/CHANGES/6917.bugfix
new file mode 100644
index 00000000000..468e21a2b0f
--- /dev/null
+++ b/CHANGES/6917.bugfix
@@ -0,0 +1,3 @@
+Dropped the :class:`object` type possibility from
+the :py:attr:`aiohttp.ClientSession.timeout`
+property return type declaration.
diff --git a/CHANGES/6917.doc b/CHANGES/6917.doc
new file mode 120000
index 00000000000..b8eddb8d6dc
--- /dev/null
+++ b/CHANGES/6917.doc
@@ -0,0 +1 @@
+6917.bugfix
\ No newline at end of file
diff --git a/CHANGES/6923.bugfix b/CHANGES/6923.bugfix
new file mode 120000
index 00000000000..b8eddb8d6dc
--- /dev/null
+++ b/CHANGES/6923.bugfix
@@ -0,0 +1 @@
+6917.bugfix
\ No newline at end of file
diff --git a/CHANGES/6923.doc b/CHANGES/6923.doc
new file mode 120000
index 00000000000..c05397962f9
--- /dev/null
+++ b/CHANGES/6923.doc
@@ -0,0 +1 @@
+6917.doc
\ No newline at end of file
diff --git a/aiohttp/client.py b/aiohttp/client.py
index f965f3de663..0d0f4c16c0c 100644
--- a/aiohttp/client.py
+++ b/aiohttp/client.py
@@ -1027,7 +1027,7 @@ def loop(self) -> asyncio.AbstractEventLoop:
         return self._loop
 
     @property
-    def timeout(self) -> Union[object, ClientTimeout]:
+    def timeout(self) -> ClientTimeout:
         """Timeout for the session."""
         return self._timeout