diff --git a/src/server/BreCal/database/enums.py b/src/server/BreCal/database/enums.py
index 7f8fc3d..90726b3 100644
--- a/src/server/BreCal/database/enums.py
+++ b/src/server/BreCal/database/enums.py
@@ -11,7 +11,7 @@ class ParticipantType(IntFlag):
     PORT_ADMINISTRATION = 32
     TUG = 64
 
-class ShipcallType(Enum):
+class ShipcallType(IntEnum):
     """determines the type of a shipcall, as this changes the applicable validation rules"""
     INCOMING = 1
     OUTGOING = 2
@@ -28,7 +28,7 @@ class ParticipantwiseTimeDelta():
 
     NOTIFICATION = 10.0 # after n minutes, an evaluation may rise a notification
 
-class StatusFlags(Enum):
+class StatusFlags(IntEnum):
     """
     these enumerators ensure that each traffic light validation rule state corresponds to a value, which will be used in the ValidationRules object to identify
     the necessity of notifications.
@@ -39,6 +39,7 @@ class StatusFlags(Enum):
     RED = 3
 
 class PierSide(IntEnum):
+    """These enumerators determine the pier side of a shipcall."""
     PORTSIDE = 0 # Port/Backbord
     STARBOARD_SIDE = 1 # Starboard / Steuerbord