Index: mailman-3.3.9/setup.py
===================================================================
--- mailman-3.3.9.orig/setup.py
+++ mailman-3.3.9/setup.py
@@ -119,8 +119,8 @@ case second 'm'.  Any other spelling is
         'dnspython>=1.14.0',
         'falcon>=3.0.0',
         'flufl.bounce>=4.0',
-        'flufl.i18n>=3.2',
-        'flufl.lock>=5.1',
+        'flufl-i18n>=3.2',
+        'flufl_lock>=5.1',
         'gunicorn',
         'lazr.config',
         'python-dateutil>=2.0',
Index: mailman-3.3.9/src/mailman.egg-info/requires.txt
===================================================================
--- mailman-3.3.9.orig/src/mailman.egg-info/requires.txt
+++ mailman-3.3.9/src/mailman.egg-info/requires.txt
@@ -7,8 +7,8 @@ click>=8.0.0
 dnspython>=1.14.0
 falcon>=3.0.0
 flufl.bounce>=4.0
-flufl.i18n>=3.2
-flufl.lock>=5.1
+flufl-i18n>=3.2
+flufl_lock>=5.1
 gunicorn
 lazr.config
 python-dateutil>=2.0