diff --git a/octoprint_pause_for_user_event/__init__.py b/octoprint_pause_for_user_event/__init__.py
index f3f1880..1159f4b 100644
--- a/octoprint_pause_for_user_event/__init__.py
+++ b/octoprint_pause_for_user_event/__init__.py
@@ -53,6 +53,7 @@ def recv_callback(self, comm_instance, line, *args, **kwargs):
 # ("OctoPrint-PluginSkeleton"), you may define that here. Same goes for the other metadata derived from setup.py that
 # can be overwritten via __plugin_xyz__ control properties. See the documentation for that.
 __plugin_name__ = "PauseForUser Event Plugin"
+__plugin_pythoncompat__ = ">=2.7,<4"  # Python 2 and 3
 
 def __plugin_load__():
     global __plugin_implementation__