diff --git a/mypy.ini b/mypy.ini
index 4040bca..c98bb4c 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -17,6 +17,10 @@ ignore_missing_imports = True
 # https://github.com/seanthegeek/mailsuite/issues/9
 ignore_missing_imports = True
 
+[mypy-msgraph.core]
+# https://github.com/microsoftgraph/msgraph-sdk-python-core/issues/446
+ignore_missing_imports = True
+
 [mypy-mailparser.*]
 # https://github.com/SpamScope/mail-parser
 ignore_missing_imports = True