diff --git a/components/esp32_presense/BleFingerprint.cpp b/components/esp32_presense/BleFingerprint.cpp
index 0a81034..8364881 100644
--- a/components/esp32_presense/BleFingerprint.cpp
+++ b/components/esp32_presense/BleFingerprint.cpp
@@ -443,17 +443,17 @@ bool BleFingerprint::fill(JsonObject *doc) {
     (*doc)["rssi@1m"] = get1mRssi();
     (*doc)["rssi"] = rssi;
 
-    if (isnormal(raw)) (*doc)["raw"] = serialized(std::string(raw, 2));
-    if (isnormal(dist)) (*doc)["distance"] = serialized(std::string(dist, 2));
-    if (isnormal(vari)) (*doc)["var"] = serialized(std::string(vari, 2));
+    if (isnormal(raw)) (*doc)["raw"] = serialized(std::to_string(raw, 2));
+    if (isnormal(dist)) (*doc)["distance"] = serialized(std::to_string(dist, 2));
+    if (isnormal(vari)) (*doc)["var"] = serialized(std::to_string(vari, 2));
     if (close) (*doc)["close"] = true;
 
     (*doc)["int"] = (millis() - firstSeenMillis) / seenCount;
 
     if (mv) (*doc)["mV"] = mv;
     if (battery != 0xFF) (*doc)["batt"] = battery;
-    if (temp) (*doc)["temp"] = serialized(std::string(temp, 1));
-    if (humidity) (*doc)["rh"] = serialized(std::string(humidity, 1));
+    if (temp) (*doc)["temp"] = serialized(std::to_string(temp, 1));
+    if (humidity) (*doc)["rh"] = serialized(std::to_string(humidity, 1));
     return true;
 }