diff --git a/examples/addons/commands-flows.py b/examples/addons/commands-flows.py
index 0cdd06c01..866a46170 100644
--- a/examples/addons/commands-flows.py
+++ b/examples/addons/commands-flows.py
@@ -4,13 +4,15 @@ import typing
 from mitmproxy import command
 from mitmproxy import ctx
 from mitmproxy import flow
+from mitmproxy import http
 
 
 class MyAddon:
     @command.command("myaddon.addheader")
     def addheader(self, flows: typing.Sequence[flow.Flow]) -> None:
         for f in flows:
-            f.request.headers["myheader"] = "value"
+            if isinstance(f, http.HTTPFlow):
+                f.request.headers["myheader"] = "value"
         ctx.log.alert("done")
 
 
diff --git a/examples/addons/commands-paths.py b/examples/addons/commands-paths.py
index d1791c998..ea3431c34 100644
--- a/examples/addons/commands-paths.py
+++ b/examples/addons/commands-paths.py
@@ -4,6 +4,7 @@ import typing
 from mitmproxy import command
 from mitmproxy import ctx
 from mitmproxy import flow
+from mitmproxy import http
 from mitmproxy import types
 
 
@@ -14,9 +15,10 @@ class MyAddon:
         flows: typing.Sequence[flow.Flow],
         path: types.Path,
     ) -> None:
-        totals = {}
+        totals: typing.Dict[str, int] = {}
         for f in flows:
-            totals[f.request.host] = totals.setdefault(f.request.host, 0) + 1
+            if isinstance(f, http.HTTPFlow):
+                totals[f.request.host] = totals.setdefault(f.request.host, 0) + 1
 
         with open(path, "w+") as fp:
             for cnt, dom in sorted([(v, k) for (k, v) in totals.items()]):
diff --git a/examples/addons/http-trailers.py b/examples/addons/http-trailers.py
index ba0732ba1..f798cd296 100644
--- a/examples/addons/http-trailers.py
+++ b/examples/addons/http-trailers.py
@@ -36,6 +36,7 @@ def request(flow: http.HTTPFlow):
 
 
 def response(flow: http.HTTPFlow):
+    assert flow.response  # make type checker happy
     if flow.response.trailers:
         print("HTTP Trailers detected! Response contains:", flow.response.trailers)
 
diff --git a/examples/addons/internet_in_mirror.py b/examples/addons/internet_in_mirror.py
index 7ee1821d1..8d33cea90 100644
--- a/examples/addons/internet_in_mirror.py
+++ b/examples/addons/internet_in_mirror.py
@@ -7,5 +7,6 @@ from mitmproxy import http
 
 
 def response(flow: http.HTTPFlow) -> None:
+    assert flow.response  # make type checker happy
     reflector = b"<style>body {transform: scaleX(-1);}</style></head>"
     flow.response.content = flow.response.content.replace(b"</head>", reflector)
diff --git a/examples/addons/io-read-saved-flows.py b/examples/addons/io-read-saved-flows.py
index 7b0f0cd39..f6a177be4 100644
--- a/examples/addons/io-read-saved-flows.py
+++ b/examples/addons/io-read-saved-flows.py
@@ -2,7 +2,7 @@
 """
 Read a mitmproxy dump file.
 """
-from mitmproxy import io
+from mitmproxy import io, http
 from mitmproxy.exceptions import FlowReadException
 import pprint
 import sys
@@ -13,7 +13,8 @@ with open(sys.argv[1], "rb") as logfile:
     try:
         for f in freader.stream():
             print(f)
-            print(f.request.host)
+            if isinstance(f, http.HTTPFlow):
+                print(f.request.host)
             pp.pprint(f.get_state())
             print("")
     except FlowReadException as e:
diff --git a/mitmproxy/certs.py b/mitmproxy/certs.py
index e5f121bde..dd1adb617 100644
--- a/mitmproxy/certs.py
+++ b/mitmproxy/certs.py
@@ -136,9 +136,9 @@ class Cert(serializable.Serializable):
             return []
         else:
             return (
-                    ext.get_values_for_type(x509.DNSName)
-                    +
-                    [str(x) for x in ext.get_values_for_type(x509.IPAddress)]
+                ext.get_values_for_type(x509.DNSName)
+                +
+                [str(x) for x in ext.get_values_for_type(x509.IPAddress)]
             )
 
 
@@ -151,9 +151,9 @@ def _name_to_keyval(name: x509.Name) -> List[Tuple[str, str]]:
 
 
 def create_ca(
-        organization: str,
-        cn: str,
-        key_size: int,
+    organization: str,
+    cn: str,
+    key_size: int,
 ) -> Tuple[rsa.RSAPrivateKeyWithSerialization, x509.Certificate]:
     now = datetime.datetime.now()
 
@@ -192,11 +192,11 @@ def create_ca(
 
 
 def dummy_cert(
-        privkey: rsa.RSAPrivateKey,
-        cacert: x509.Certificate,
-        commonname: Optional[str],
-        sans: List[str],
-        organization: Optional[str] = None,
+    privkey: rsa.RSAPrivateKey,
+    cacert: x509.Certificate,
+    commonname: Optional[str],
+    sans: List[str],
+    organization: Optional[str] = None,
 ) -> Cert:
     """
         Generates a dummy certificate.
@@ -220,7 +220,7 @@ def dummy_cert(
 
     subject = []
     is_valid_commonname = (
-            commonname is not None and len(commonname) < 64
+        commonname is not None and len(commonname) < 64
     )
     if is_valid_commonname:
         assert commonname is not None
@@ -268,11 +268,11 @@ class CertStore:
     expire_queue: List[CertStoreEntry]
 
     def __init__(
-            self,
-            default_privatekey: rsa.RSAPrivateKey,
-            default_ca: Cert,
-            default_chain_file: Optional[Path],
-            dhparams: DHParams
+        self,
+        default_privatekey: rsa.RSAPrivateKey,
+        default_ca: Cert,
+        default_chain_file: Optional[Path],
+        dhparams: DHParams
     ):
         self.default_privatekey = default_privatekey
         self.default_ca = default_ca
@@ -311,11 +311,11 @@ class CertStore:
 
     @classmethod
     def from_store(
-            cls,
-            path: Union[Path, str],
-            basename: str,
-            key_size: int,
-            passphrase: Optional[bytes] = None
+        cls,
+        path: Union[Path, str],
+        basename: str,
+        key_size: int,
+        passphrase: Optional[bytes] = None
     ) -> "CertStore":
         path = Path(path)
         ca_file = path / f"{basename}-ca.pem"
@@ -393,9 +393,9 @@ class CertStore:
 
         # Dump the certificate in PKCS12 format for Windows devices
         (path / f"{basename}-ca-cert.p12").write_bytes(
-            pkcs12.serialize_key_and_certificates(  # type: ignore
+            pkcs12.serialize_key_and_certificates(
                 name=basename.encode(),
-                key=None,
+                key=None,  # type: ignore
                 cert=ca,
                 cas=None,
                 encryption_algorithm=serialization.NoEncryption(),
@@ -442,10 +442,10 @@ class CertStore:
         return ret
 
     def get_cert(
-            self,
-            commonname: Optional[str],
-            sans: List[str],
-            organization: Optional[str] = None
+        self,
+        commonname: Optional[str],
+        sans: List[str],
+        organization: Optional[str] = None
     ) -> CertStoreEntry:
         """
             commonname: Common name for the generated certificate. Must be a
diff --git a/mitmproxy/contrib/urwid/__init__.py b/mitmproxy/contrib/urwid/__init__.py
new file mode 100644
index 000000000..e69de29bb
diff --git a/mitmproxy/test/tflow.py b/mitmproxy/test/tflow.py
index 0a0755ad1..1d481d741 100644
--- a/mitmproxy/test/tflow.py
+++ b/mitmproxy/test/tflow.py
@@ -1,15 +1,13 @@
-import io
 import uuid
 
-from mitmproxy.test import tutils
+from mitmproxy import controller
+from mitmproxy import flow
+from mitmproxy import http
 from mitmproxy import tcp
 from mitmproxy import websocket
-from mitmproxy import controller
-from mitmproxy import http
-from mitmproxy import flow
 from mitmproxy.net import http as net_http
 from mitmproxy.proxy import context
-
+from mitmproxy.test import tutils
 from wsproto.frame_protocol import Opcode
 
 
@@ -34,7 +32,6 @@ def ttcpflow(client_conn=True, server_conn=True, messages=True, err=None):
 
 
 def twebsocketflow(client_conn=True, server_conn=True, messages=True, err=None, handshake_flow=True):
-
     if client_conn is True:
         client_conn = tclient_conn()
     if server_conn is True:
@@ -169,7 +166,7 @@ def tclient_conn() -> context.Client:
         alpn_offers=[],
         cipher_list=[],
     ))
-    c.reply = controller.DummyReply()
+    c.reply = controller.DummyReply()  # type: ignore
     return c
 
 
@@ -197,9 +194,7 @@ def tserver_conn() -> context.Server:
         cipher_list=[],
         via2=None,
     ))
-    c.reply = controller.DummyReply()
-    c.rfile = io.BytesIO()
-    c.wfile = io.BytesIO()
+    c.reply = controller.DummyReply()  # type: ignore
     return c
 
 
diff --git a/mitmproxy/test/tutils.py b/mitmproxy/test/tutils.py
index 6ace1056e..0b0b41904 100644
--- a/mitmproxy/test/tutils.py
+++ b/mitmproxy/test/tutils.py
@@ -21,7 +21,7 @@ def treq(**kwargs) -> http.Request:
         timestamp_end=946681201,
     )
     default.update(kwargs)
-    return http.Request(**default)
+    return http.Request(**default)  # type: ignore
 
 
 def tresp(**kwargs) -> http.Response:
@@ -40,4 +40,4 @@ def tresp(**kwargs) -> http.Response:
         timestamp_end=946681203,
     )
     default.update(kwargs)
-    return http.Response(**default)
+    return http.Response(**default)  # type: ignore
diff --git a/mitmproxy/tools/console/window.py b/mitmproxy/tools/console/window.py
index cff2e3891..cae290092 100644
--- a/mitmproxy/tools/console/window.py
+++ b/mitmproxy/tools/console/window.py
@@ -18,7 +18,7 @@ from mitmproxy.tools.console import statusbar
 if os.name == "nt":
     from mitmproxy.contrib.urwid import raw_display
 else:
-    from urwid import raw_display
+    from urwid import raw_display  # type: ignore
 
 
 class StackWidget(urwid.Frame):
diff --git a/setup.cfg b/setup.cfg
index 22a91e0a1..7eb500ad4 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -25,6 +25,7 @@ exclude_lines =
 
 [mypy]
 ignore_missing_imports = True
+files = mitmproxy,examples/addons,release
 
 [mypy-mitmproxy.contrib.*]
 ignore_errors = True
diff --git a/tox.ini b/tox.ini
index 01fd1cc45..00d1ef770 100644
--- a/tox.ini
+++ b/tox.ini
@@ -28,9 +28,9 @@ commands =
   python ./test/filename_matching.py
 
 [testenv:mypy]
-deps = mypy==0.790
+deps = mypy==0.800
 commands =
-  mypy . {posargs}
+  mypy {posargs}
   
 [testenv:individual_coverage]
 commands =