django 3.2.*

src/viralhostrange/requirements.txt

-Django==2.2.*
+Django<4.0
 psycopg2
 psycopg2-binary
 mod_wsgi

src/viralhostrange/viralhostrange/settings.py

@@ -291,5 +291,6 @@ BACKUP_MIN_WEEKS_TO_KEEP = int(18 * 52 / 12)
 # Django tunning for this project
 ################################################################################
 DATA_UPLOAD_MAX_NUMBER_FIELDS = 10000
+DEFAULT_AUTO_FIELD = 'django.db.models.BigAutoField'
 
 ################################################################################

src/viralhostrange/viralhostrangedb/views_api.py

@@ -182,6 +182,9 @@ class Round(Func):
     arity = 2
     arg_joiner = '::numeric, '
 
+    def __init__(self, *expressions,  **extra):
+        super().__init__(*expressions, output_field=FloatField(), **extra)
+
     def as_sqlite(self, compiler, connection, **extra_context):
         return super().as_sqlite(compiler, connection, arg_joiner=", ", **extra_context)