diff --git a/website/admin.py b/website/admin.py
index 22a7822e4cd..bad348c80b6 100644
--- a/website/admin.py
+++ b/website/admin.py
@@ -166,7 +166,7 @@ def mark_as_teacher(self, username_teacher):
 
         update_is_teacher(self.db, teacher, is_teacher_value)
 
-        return make_response('', 200)
+        return make_response({}, 200)
 
     @route("/mark-super-teacher/<username_teacher>", methods=["POST"])
     @requires_admin
@@ -231,7 +231,7 @@ def change_user_email(self, user):
                 )
             except BaseException:
                 return make_response(gettext("mail_error_change_processed"), 400)
-        return make_response('', 200)
+        return make_response({}, 200)
 
     @route("/getUserTags", methods=["POST"])
     @requires_admin
diff --git a/website/auth_pages.py b/website/auth_pages.py
index d708fdad6d7..2b8a8b035b8 100644
--- a/website/auth_pages.py
+++ b/website/auth_pages.py
@@ -487,7 +487,7 @@ def store_new_account(self, account, email):
                 )
             except BaseException:
                 return user, make_response({gettext("mail_error_change_processed")}, 400)
-            resp = make_response('', 200)
+            resp = make_response({}, 200)
         return user, resp
 
     @route('/public_profile', methods=['POST'])
diff --git a/website/classes.py b/website/classes.py
index 14c86ec7db0..9b85220c50d 100644
--- a/website/classes.py
+++ b/website/classes.py
@@ -176,7 +176,7 @@ def join_class(self):
             # Also remove the pending message in this case
             session["messages"] = session["messages"] - 1 if session["messages"] else 0
 
-        return make_response('', 200)
+        return make_response({}, 200)
 
     @route("/<class_id>/student/<student_id>", methods=["DELETE"])
     @requires_login
@@ -187,7 +187,7 @@ def leave_class(self, user, class_id, student_id):
 
         self.db.remove_student_from_class(Class["id"], student_id)
         refresh_current_user_from_db()
-        return make_response('', 200)
+        return make_response({}, 200)
 
     @route("/<class_id>/second-teacher/<second_teacher>", methods=["DELETE"])
     @requires_login
@@ -199,7 +199,7 @@ def remove_second_teacher(self, user, class_id, second_teacher):
         self.db.remove_second_teacher_from_class(Class, second_teacher)
 
         refresh_current_user_from_db()
-        return make_response('', 200)
+        return make_response({}, 200)
 
 
 class MiscClassPages(WebsiteModule):
diff --git a/website/tags.py b/website/tags.py
index 5c9c9590878..2592236cc29 100644
--- a/website/tags.py
+++ b/website/tags.py
@@ -120,4 +120,4 @@ def delete_tag(self, user, tag):
         for adventure in db_tag['tagged_in']:
             self.db.delete_tag_from_adventure(tag, adventure['id'])
 
-        return make_response('', 200)
+        return make_response({}, 200)