diff --git a/aqimon/read/novapm.py b/aqimon/read/novapm.py
index 5fc6a87..c79f296 100644
--- a/aqimon/read/novapm.py
+++ b/aqimon/read/novapm.py
@@ -54,7 +54,7 @@ async def read(self) -> AqiRead:
                 pm10_reads.append(result.pm10)
             self.reader.sleep()
             self.state = ReaderState(ReaderStatus.IDLE, None)
-            return AqiRead(pmtwofive=mean(pm25_reads), pmten=mean(pm10_reads))
+            return AqiRead(pmtwofive=round(mean(pm25_reads), 2), pmten=round(mean(pm10_reads), 2))
         except Exception as e:
             self.state = ReaderState(ReaderStatus.ERRORING, e)
             self.reader.sleep()