diff --git a/src/lib/get-data.mjs b/src/lib/get-data.mjs
index 645193c..fff6aad 100644
--- a/src/lib/get-data.mjs
+++ b/src/lib/get-data.mjs
@@ -29,6 +29,8 @@ export async function getAdbsExchangeData({ lat, lon, radius }) {
     `http://public-api.adsbexchange.com/VirtualRadar/AircraftList.json?lat=${lat}&lng=${lon}&fDstL=0&fDstU=${radius}`
   );
 
+  const invalidNumber = /[^0-9.-]/;
+
   return res.data.acList.map(rec => ({
     transponder: `${rec.Icao}`.toLowerCase(),
     callsign: `${rec.Call}`.trim(),
@@ -38,11 +40,11 @@ export async function getAdbsExchangeData({ lat, lon, radius }) {
     location: rec.Lat && rec.Long ? `${rec.Lat},${rec.Long}` : null,
     lat: rec.Lat,
     lon: rec.Long,
-    baro_altitude: rec.Alt,
-    geo_altitude: rec.Galt,
+    baro_altitude: rec.Alt.replace(invalidNumber, ''),
+    geo_altitude: rec.Galt.replace(invalidNumber, ''),
     on_ground: rec.Gnd,
-    velocity: rec.Spd,
-    vertical_rate: rec.Vsi,
+    velocity: rec.Spd.replace(invalidNumber, ''),
+    vertical_rate: rec.Vsi.replace(invalidNumber, ''),
     squawk: rec.Sqk,
     spi: false,
     position_source: positionSourceMap[rec.Trt],