diff --git a/setup.py b/setup.py
index 559a441..71e5369 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@
 plugin_name = "OctoPrint-FirmwareUpdater"
 
 # The plugin's version. Can be overwritten within OctoPrint's internal data via __plugin_version__ in the plugin module
-plugin_version = "1.10.9"
+plugin_version = "1.10.10b0"
 
 
 # The plugin's description. Can be overwritten within OctoPrint's internal data via __plugin_description__ in the plugin
@@ -34,7 +34,7 @@
 plugin_license = "AGPLv3"
 
 # Any additional requirements besides OctoPrint should be listed here
-plugin_requires = ["pyserial>=3.5"]
+plugin_requires = ["pyserial>=3.4"]
 
 ### --------------------------------------------------------------------------------------------------------------------
 ### More advanced options that you usually shouldn't have to touch follow after this point