diff --git a/ampel-firmware/web_config.cpp b/ampel-firmware/web_config.cpp
index af814efba4200d2700311264e9ef891bd757b479..04e3d20b03be6fac80c9446469d68f89cac0455b 100644
--- a/ampel-firmware/web_config.cpp
+++ b/ampel-firmware/web_config.cpp
@@ -7,7 +7,6 @@ namespace config {
 
 //TODO: Is there any conflict with SPIFFS/LittleFS?
 //TODO: Actually use those parameters
-//TODO: Make sure values are *really* set to defaults during first run.
 
 namespace web_config {
 #if defined(ESP8266)
@@ -20,8 +19,10 @@ namespace web_config {
 
   IotWebConf *iotWebConf;
 
-// -- Configuration specific key. The value should be modified if config structure was changed.
-  const char config_version[] = "ampel_test_v6";
+  // -- Configuration specific key. The value should be modified if config structure was changed.
+  // Also shouldn't be longer than
+
+  const char config_version[IOTWEBCONF_CONFIG_VERSION_LENGTH] = "a01";
 
   /**
    * Services