diff --git a/pyproject.toml b/pyproject.toml
index 2b70394..abd45c5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,7 @@ python_version = "3.11"
 # disallow_any_generics = true
 # disallow_untyped_defs = true
 # warn_redundant_casts = true
-# warn_return_any = true
+warn_return_any = true
 warn_unused_configs = true
 # warn_unused_ignores = true
 # warn_unreachable = true
diff --git a/src/capport/api/proxy_fix.py b/src/capport/api/proxy_fix.py
index e6121a3..6162e82 100644
--- a/src/capport/api/proxy_fix.py
+++ b/src/capport/api/proxy_fix.py
@@ -67,7 +67,10 @@ def local_proxy_fix(request: quart.Request):
 
 
 class LocalProxyFixRequestHandler:
-    def __init__(self, orig_handle_request):
+    def __init__(
+        self,
+        orig_handle_request: typing.Callable[[quart.Request], typing.Awaitable[quart.Response | werkzeug.Response]],
+    ):
         self._orig_handle_request = orig_handle_request
 
     async def __call__(self, request: quart.Request) -> quart.Response | werkzeug.Response:
diff --git a/src/capport/utils/nft_socket.py b/src/capport/utils/nft_socket.py
index 70884db..41e1b66 100644
--- a/src/capport/utils/nft_socket.py
+++ b/src/capport/utils/nft_socket.py
@@ -50,7 +50,7 @@ _monkey_patch_pyroute2()
 
 
 def _build(msg_class: type[_NlMsgBase], /, attrs: dict = {}, header: dict = {}, **fields) -> _NlMsgBase:
-    msg = msg_class()
+    msg: _NlMsgBase = msg_class()
     for key, value in header.items():
         msg["header"][key] = value
     for key, value in fields.items():
@@ -102,16 +102,32 @@ class NFTSocket(pyroute2.netlink.nlsocket.NetlinkSocket):
         with self.begin() as tx:
             tx.put(msg_type, msg_flags, attrs=attrs, **fields)
 
-    def nft_dump(self, msg_type: int, msg_flags: int = 0, /, *, attrs: dict = {}, **fields) -> None:
+    def nft_dump(
+        self,
+        msg_type: int,
+        msg_flags: int = 0,
+        /,
+        *,
+        attrs: dict = {},
+        **fields,
+    ) -> typing.Iterator[nfgen_msg]:
         msg_flags |= pyroute2.netlink.NLM_F_DUMP
         return self.nft_get(msg_type, msg_flags, attrs=attrs, **fields)
 
-    def nft_get(self, msg_type: int, msg_flags: int = 0, /, *, attrs: dict = {}, **fields) -> None:
+    def nft_get(
+        self,
+        msg_type: int,
+        msg_flags: int = 0,
+        /,
+        *,
+        attrs: dict = {},
+        **fields,
+    ) -> typing.Iterator[nfgen_msg]:
         msg_class: type[_nftsocket.nft_gen_msg] = self.policy[msg_type]
         msg_type = (NFNL_SUBSYS_NFTABLES << 8) | msg_type
         msg_flags |= pyroute2.netlink.NLM_F_REQUEST
         msg = _build(msg_class, attrs=attrs, **fields)
-        return self.nlm_request(msg, msg_type, msg_flags)
+        return self.nlm_request(msg, msg_type, msg_flags)  # type: ignore
 
 
 class NFTTransaction: