diff --git a/main.py b/main.py
index 1881379..eab7b97 100644
--- a/main.py
+++ b/main.py
@@ -86,7 +86,7 @@ if DEBUG:
 TIMEDELTA_SYNCHRO = datetime.timedelta(days=15)  # Number of days to look for
 # for synchronization
 
-with open('ntnoe_credentials') as f:
+with open(os.path.join(APP_DIR, 'ntnoe_credentials')) as f:
     NTNOE_ID, NTNOE_PASS, _ = f.read().split('\n')
 
 SCOPES = 'https://www.googleapis.com/auth/calendar'