diff --git a/pp/wifipiano2.py b/pp/wifipiano2.py
index 4cbc51f..a95044f 100644
--- a/pp/wifipiano2.py
+++ b/pp/wifipiano2.py
@@ -102,12 +102,14 @@ class piano:
 			multiplier = 1.1
 			if scoreMods & mods.NOFAIL != 0:
 				multiplier *= 0.90
-			if scoreMods & mods.DOUBLETIME != 0:
-				multiplier *= 1.75
 			if scoreMods & mods.SPUNOUT != 0:
 				multiplier *= 0.95
 			if scoreMods & mods.EASY != 0:
 				multiplier *= 0.50
+			if scoreMods & mods.DOUBLETIME != 0:
+				multiplier *= 2.45
+			if scoreMods & mods.HALFTIME != 0:
+				multiplier *= 0.50
 			pp = pow(pow(strainPP, 1.1) + pow(accPP, 1.1), 1.0 / 1.1) * multiplier
 			log.debug("[WIFIPIANO2] Calculated PP: {}".format(pp))