diff --git a/models/User.py b/models/User.py
index 066ebf5..d455980 100644
--- a/models/User.py
+++ b/models/User.py
@@ -61,8 +61,8 @@ class User(UserMixin):
 
     # Returns all heatmap-values from the last 28 days
     def get_heatmap(self) -> list:
-        # get current day of week as integer. monday is 1 and sunday is 7
-        weekday = datetime.today().weekday() + 1
+        # get current day of week as integer. monday is 0 and sunday is 6
+        weekday = datetime.today().weekday()
         heatmap = []
 
         # append the heatmap values of the current week