diff --git a/MQ135.h b/MQ135.h
index 22cefec..f25808e 100755
--- a/MQ135.h
+++ b/MQ135.h
@@ -22,7 +22,7 @@ v1.0 - First release
 #endif
 
 /// The load resistance on the board
-#define RLOAD 10.0
+#define RLOAD 1.0
 /// Calibration resistance at atmospheric CO2 level
 #define RZERO 76.63
 /// Parameters for calculating ppm of CO2 from sensor resistance