diff --git a/zerver/exceptions.py b/zerver/exceptions.py
index 69922ddb73..ffb837a0ab 100644
--- a/zerver/exceptions.py
+++ b/zerver/exceptions.py
@@ -4,4 +4,5 @@ from django.core.exceptions import PermissionDenied
 
 class RateLimited(PermissionDenied):
     def __init__(self, msg=""):
+        # type: (str) -> None
         super(RateLimited, self).__init__(msg)
diff --git a/zerver/filters.py b/zerver/filters.py
index 316c35f038..04e5a70649 100644
--- a/zerver/filters.py
+++ b/zerver/filters.py
@@ -1,10 +1,13 @@
 from __future__ import absolute_import
 
+from typing import Any
+
 from django.views.debug import SafeExceptionReporterFilter
-from django.http import build_request_repr
+from django.http import HttpRequest, build_request_repr
 
 class ZulipExceptionReporterFilter(SafeExceptionReporterFilter):
     def get_post_parameters(self, request):
+        # type: (HttpRequest) -> Dict[str, Any]
         filtered_post = SafeExceptionReporterFilter.get_post_parameters(self, request).copy()
         filtered_vars = ['content', 'secret', 'password', 'key', 'api-key', 'subject', 'stream',
                          'subscriptions', 'to', 'csrfmiddlewaretoken', 'api_key']
@@ -14,6 +17,7 @@ class ZulipExceptionReporterFilter(SafeExceptionReporterFilter):
                 filtered_post[var] = '**********'
         return filtered_post
     def get_request_repr(self, request):
+        # type: (HttpRequest) -> str
         if request is None:
             return repr(None)
         else:
diff --git a/zerver/logging_handlers.py b/zerver/logging_handlers.py
index ecd7cd3d0b..440ba60153 100644
--- a/zerver/logging_handlers.py
+++ b/zerver/logging_handlers.py
@@ -7,6 +7,7 @@ import traceback
 import platform
 
 from django.core import mail
+from django.http import HttpRequest
 from django.utils.log import AdminEmailHandler
 from django.views.debug import ExceptionReporter, get_exception_reporter_filter
 
@@ -20,11 +21,13 @@ class AdminZulipHandler(logging.Handler):
     # adapted in part from django/utils/log.py
 
     def __init__(self):
+        # type: () -> None
         logging.Handler.__init__(self)
 
     def emit(self, record):
+        # type: (ExceptionReporter) -> None
         try:
-            request = record.request
+            request = record.request # type: HttpRequest
 
             filter = get_exception_reporter_filter(request)