diff --git a/constants.h b/constants.h
index ee9ecd8..a700516 100644
--- a/constants.h
+++ b/constants.h
@@ -10,4 +10,6 @@
 #define TOPIC_STATE "garden/state"
 
 #define SLEEP_MILLIS_EARLY (1000 * 60)
-#define SLEEP_MILLIS (1000 * 60 * 60)
\ No newline at end of file
+#define SLEEP_MILLIS (1000 * 60 * 60)
+
+#define VERSION __DATE__ " " __TIME__
\ No newline at end of file
diff --git a/mqtt_discovery.cpp b/mqtt_discovery.cpp
index e962913..dcf5134 100644
--- a/mqtt_discovery.cpp
+++ b/mqtt_discovery.cpp
@@ -38,6 +38,7 @@ static bool publish_config(PubSubClient* mqtt, const char* topic,
     device["manufacturer"] = DEVICE_MANUFACTURER;
     device["name"] = DEVICE_NAME;
     device["model"] = DEVICE_MODEL;
+    device["sw_version"] = VERSION;
     auto ident = device.createNestedArray("identifiers");
     ident.add(config->identifier);
     String msg;