diff --git a/src/web/AmsWebServer.cpp b/src/web/AmsWebServer.cpp
index a74ddda4..7a89719f 100644
--- a/src/web/AmsWebServer.cpp
+++ b/src/web/AmsWebServer.cpp
@@ -695,7 +695,7 @@ void AmsWebServer::dataJson() {
 		mqttStatus = 3;
 	}
 
-	char json[280];
+	char json[284];
 	snprintf_P(json, sizeof(json), DATA_JSON,
 		maxPwr == 0 ? meterState->isThreePhase() ? 20000 : 10000 : maxPwr,
 		meterConfig->productionCapacity,
diff --git a/web/data.json b/web/data.json
index 346535a4..1b8e266f 100644
--- a/web/data.json
+++ b/web/data.json
@@ -10,13 +10,13 @@
     "ec" : %.1f,
     "ric" : %.1f,
     "rec" : %.1f,
-    "u1" : %.1f,
-    "u2" : %.1f,
-    "u3" : %.1f,
+    "u1" : %.2f,
+    "u2" : %.2f,
+    "u3" : %.2f,
     "i1" : %.2f,
     "i2" : %.2f,
     "i3" : %.2f,
-    "v" : %.2f,
+    "v" : %.3f,
     "r" : %d,
     "t" : %.1f,
     "u" : %lu,