diff --git a/frappe/database/postgres/setup_db.py b/frappe/database/postgres/setup_db.py
index 3323a68312..5118a38509 100644
--- a/frappe/database/postgres/setup_db.py
+++ b/frappe/database/postgres/setup_db.py
@@ -1,7 +1,9 @@
 import os
+import re
 
 import frappe
 from frappe.database.db_manager import DbManager
+from frappe.utils import cint
 
 
 def setup_database():
@@ -13,9 +15,11 @@ def setup_database():
 	root_conn.sql(f"CREATE DATABASE `{frappe.conf.db_name}`")
 	root_conn.sql(f"CREATE user {frappe.conf.db_name} password '{frappe.conf.db_password}'")
 	root_conn.sql("GRANT ALL PRIVILEGES ON DATABASE `{0}` TO {0}".format(frappe.conf.db_name))
-	psql_version = root_conn.sql(f"SELECT VERSION()", as_dict=True)
-	if psql_version and psql_version[0].get("version", "PostgreSQL 14").split()[1] >= "15":
-		root_conn.sql("ALTER DATABASE `{0}` OWNER TO {0}".format(frappe.conf.db_name))
+	if psql_version := root_conn.sql("SELECT VERSION()", as_dict=True):
+		version_string = psql_version[0].get("version") or "PostgreSQL 14"
+		major_version = cint(re.split(r"[\w\.]", version_string)[1])
+		if major_version > 15:
+			root_conn.sql("ALTER DATABASE `{0}` OWNER TO {0}".format(frappe.conf.db_name))
 	root_conn.close()