diff --git a/readers.json b/readers.json
index 6b1fbd6..456af0e 100644
--- a/readers.json
+++ b/readers.json
@@ -152,9 +152,9 @@
         "TransmitFrequencyMHz": 867.5,
         "MinimalRssi": -80,
         "ConnectedAntennaPowers": {
-          "1": 27,
-          "2": 27,
-          "3": 27
+          "1": 27.5,
+          "2": 27.5,
+          "3": 27.5
         }
       },
       {