diff --git a/advlabdb/adminModelViews.py b/advlabdb/adminModelViews.py
index 32a4f84..9c6abab 100644
--- a/advlabdb/adminModelViews.py
+++ b/advlabdb/adminModelViews.py
@@ -70,7 +70,7 @@ from .models import (
 
 
 def semesterExperimentQueryFactory():
-    return SemesterExperiment.query.filter(SemesterExperiment.semester == current_user.active_semester)
+    return SemesterExperiment.query.where(SemesterExperiment.semester == current_user.active_semester)
 
 
 class SemesterRowFilter(FilterEqual):
@@ -85,7 +85,7 @@ class SemesterRowFilter(FilterEqual):
 class UserView(SecureAdminModelView):
     class SemesterFilter(SemesterRowFilter):
         def apply(self, query, value, alias=None):
-            return query.filter(self.column.active_semester_id == int(value))
+            return query.where(self.column.active_semester_id == int(value))
 
     class CreateForm(Form):
         def roleQueryFactory():
@@ -462,11 +462,11 @@ class StudentView(SecureAdminModelView):
 
 
 def partQueryFactory():
-    return Part.query.filter(Part.semester == current_user.active_semester)
+    return Part.query.where(Part.semester == current_user.active_semester)
 
 
 def groupQueryFactory():
-    return Group.query.filter(Group.semester == current_user.active_semester)
+    return Group.query.where(Group.semester == current_user.active_semester)
 
 
 class PartRowFilter(FilterEqual):
@@ -481,7 +481,7 @@ class PartRowFilter(FilterEqual):
 class PartStudentView(SecureAdminModelView):
     class PartFilter(PartRowFilter):
         def apply(self, query, value, alias=None):
-            return query.filter(self.column.part_id == int(value))
+            return query.where(self.column.part_id == int(value))
 
     class StudentEndpointLinkRowAction(CustomIdEndpointLinkRowAction):
         def customId(self, row):
@@ -583,7 +583,7 @@ class ProgramRowFilter(FilterEqual):
 class GroupView(SecureAdminModelView):
     class ProgramFilter(ProgramRowFilter):
         def apply(self, query, value, alias=None):
-            return query.filter(self.column.program_id == int(value))
+            return query.where(self.column.program_id == int(value))
 
     def formFactory(is_created, group):
         if is_created:
@@ -645,7 +645,7 @@ class GroupView(SecureAdminModelView):
 class ExperimentView(SecureAdminModelView):
     class ProgramFilter(ProgramRowFilter):
         def apply(self, query, value, alias=None):
-            return query.filter(self.column.program_id == int(value))
+            return query.where(self.column.program_id == int(value))
 
     can_view_details = True
 
@@ -716,7 +716,7 @@ class SemesterExperimentView(SecureAdminModelView):
 
     class CreateForm(Form):
         def experimentQueryFactory():
-            return Experiment.query.filter(Experiment.active == True)
+            return Experiment.query.where(Experiment.active == True)
 
         experiment = QuerySelectField(
             "Experiment",
@@ -838,7 +838,7 @@ class AssistantView(SecureAdminModelView):
             return row.user_id
 
     def assistantUserQueryFactory():
-        return User.query.filter(User.roles.any(Role.name == "assistant"))
+        return User.query.join(User.roles).where(Role.name == "assistant")
 
     can_view_details = True
 
@@ -1099,7 +1099,7 @@ class AppointmentView(SecureAdminModelView):
 
     class AssistantFilter(AssistantRowFilter):
         def apply(self, query, value, alias=None):
-            return query.filter(self.column.assistant_id == int(value))
+            return query.where(self.column.assistant_id == int(value))
 
     class GroupExperimentEndpointLinkRowAction(CustomIdEndpointLinkRowAction):
         def customId(self, row):
@@ -1204,7 +1204,7 @@ class ExperimentMarkView(SecureAdminModelView):
 
     class AssistantFilter(AssistantRowFilter):
         def apply(self, query, value, alias=None):
-            return query.filter(self.column.assistant_id == int(value))
+            return query.where(self.column.assistant_id == int(value))
 
     class AdminFilter(FilterEqual):
         def get_options(self, view):
@@ -1215,7 +1215,7 @@ class ExperimentMarkView(SecureAdminModelView):
             return tuple((admin.id, admin.repr()) for admin in admins)
 
         def apply(self, query, value, alias=None):
-            return query.filter(self.column.admin_id == int(value))
+            return query.where(self.column.admin_id == int(value))
 
     class ExperimentFilter(ExperimentRowFilter):
         def apply(self, query, value, alias=None):
diff --git a/advlabdb/models.py b/advlabdb/models.py
index 5c32e92..8f755a0 100644
--- a/advlabdb/models.py
+++ b/advlabdb/models.py
@@ -464,7 +464,7 @@ class Semester(db.Model):
         if transferParts:
             semester.transferPartsFrom(oldSemester)
 
-        for experiment in Experiment.query.filter(Experiment.active == True):
+        for experiment in db.execute(select(Experiment).where(Experiment.active == True)).scalars():
             newSemesterExperiment = SemesterExperiment(experiment=experiment, semester=semester)
 
             if transferAssistants: