diff --git a/plugin/__init__.py b/plugin/__init__.py
index ed4c008..898f81b 100644
--- a/plugin/__init__.py
+++ b/plugin/__init__.py
@@ -27,6 +27,7 @@ import inspect
 import json
 import os
 import os.path
+import platform
 import re
 import time
 import unicodedata
@@ -1619,6 +1620,9 @@ class AnkiConnect:
 # when run inside Anki, `__name__` would be either numeric,
 # or, if installed via `link.sh`, `AnkiConnectDev`
 if __name__ != "plugin":
+    if platform.system() == "Windows" and anki_version == (2, 1, 50):
+        util.patch_anki_2_1_50_having_null_stdout_on_windows()
+
     Edit.register_with_anki()
 
     ac = AnkiConnect()
diff --git a/plugin/util.py b/plugin/util.py
index cc3c157..3ae5eb1 100644
--- a/plugin/util.py
+++ b/plugin/util.py
@@ -14,6 +14,7 @@
 # along with this program. If not, see <http://www.gnu.org/licenses/>.
 
 import os
+import sys
 
 import anki
 import anki.sync
@@ -83,3 +84,10 @@ def setting(key):
         return aqt.mw.addonManager.getConfig(__name__).get(key, DEFAULT_CONFIG[key])
     except:
         raise Exception('setting {} not found'.format(key))
+
+
+# see https://github.com/FooSoft/anki-connect/issues/308
+# fixed in https://github.com/ankitects/anki/commit/0b2a226d
+def patch_anki_2_1_50_having_null_stdout_on_windows():
+    if sys.stdout is None:
+        sys.stdout = open(os.devnull, "w", encoding="utf8")