diff --git a/octoprint_SpoolManager/DatabaseManager.py b/octoprint_SpoolManager/DatabaseManager.py
index 44981a3f..df75e682 100644
--- a/octoprint_SpoolManager/DatabaseManager.py
+++ b/octoprint_SpoolManager/DatabaseManager.py
@@ -21,7 +21,7 @@
 
 FORCE_CREATE_TABLES = False
 
-CURRENT_DATABASE_SCHEME_VERSION = 4
+CURRENT_DATABASE_SCHEME_VERSION = 5
 
 # List all Models
 MODELS = [PluginMetaDataModel, SpoolModel]
@@ -176,8 +176,39 @@ def _upgradeDatabase(self,currentDatabaseSchemeVersion, targetDatabaseSchemeVers
 
 	def _upgradeFrom4To5(self):
 		self._logger.info(" Starting 4 -> 5")
+		# What is changed:
+		# SpoolModel (needed, because lats script created a new table and altering was already done
+		# - materialCharacteristic = CharField(null=True, index=True) # strong, soft,... # since V4: new
+		# - material = CharField(null=True, index=True)	# since V4: added index
+		# - vendor = CharField(null=True, index=True) # since V4: added index
+		connection = sqlite3.connect(self._databaseSettings.fileLocation)
+		cursor = connection.cursor()
+
+		sql = """
+		PRAGMA foreign_keys=off;
+		BEGIN TRANSACTION;
+
+			ALTER TABLE 'spo_spoolmodel' ADD 'updated' DATETIME;
+			ALTER TABLE 'spo_spoolmodel' ADD 'originator' CHAR(60);
+			ALTER TABLE 'spo_spoolmodel' ADD 'materialCharacteristic' VARCHAR(255);
+			ALTER TABLE 'spo_spoolmodel' ADD 'isActive' INTEGER;
+			UPDATE 'spo_spoolmodel' SET isActive=1;
+
+			CREATE INDEX spoolmodel_materialCharacteristic ON spo_spoolmodel (materialCharacteristic);
+			CREATE INDEX spoolmodel_material ON spo_spoolmodel (material);
+			CREATE INDEX spoolmodel_vendor ON spo_spoolmodel (vendor);
+
+			UPDATE 'spo_pluginmetadatamodel' SET value=5 WHERE key='databaseSchemeVersion';
+		COMMIT;
+		PRAGMA foreign_keys=on;
+		"""
+		cursor.executescript(sql)
+
+		connection.close()
 
 		self._logger.info(" Successfully 4 -> 5")
+		pass
+
 
 	def _upgradeFrom3To4(self):
 		self._logger.info(" Starting 3 -> 4")
diff --git a/setup.py b/setup.py
index 4b7fb007..1d589a01 100644
--- a/setup.py
+++ b/setup.py
@@ -15,7 +15,7 @@
 
 # The plugin's version. Can be overwritten within OctoPrint's internal data via __plugin_version__ in the plugin module
 #
-plugin_version = "1.3.3-dev"
+plugin_version = "1.3.3"
 
 # The plugin's description. Can be overwritten within OctoPrint's internal data via __plugin_description__ in the plugin
 # module