diff --git a/NEWS.rst b/NEWS.rst
index 1a9f7353c127513b75eecaff9fde442b6c3ac9ad_TkVXUy5yc3Q=..dde0e7d311c3af5083a6606f8426734626832263_TkVXUy5yc3Q= 100644
--- a/NEWS.rst
+++ b/NEWS.rst
@@ -9,6 +9,8 @@
 
 Improve documentation generation.
 
+Fix issue with pg.extensions key in config file.
+
 4.0
 ---
 
diff --git a/odoo_scripts/config.py b/odoo_scripts/config.py
index 1a9f7353c127513b75eecaff9fde442b6c3ac9ad_b2Rvb19zY3JpcHRzL2NvbmZpZy5weQ==..dde0e7d311c3af5083a6606f8426734626832263_b2Rvb19zY3JpcHRzL2NvbmZpZy5weQ== 100644
--- a/odoo_scripts/config.py
+++ b/odoo_scripts/config.py
@@ -37,15 +37,11 @@
                     if os.path.isdir(file):
                         key_set.add(file)
             setattr(self, key, list(key_set))
-        for key in ("module_list", "module_list_tests"):
-            setattr(
-                self, key, config_parser.get(section, key, fallback="").split()
-            )
-        for key in (
-            "db_user",
-            "db_password",
-            "load-language",
-            "pg.extensions",
-        ):
+
+        def key_format(key: str) -> str:
+            """Replace invalid characters in an attribute"""
+            return key.replace("-", "_").replace(".", "_")
+
+        for key in ("module_list", "module_list_tests", "pg.extensions"):
             setattr(
                 self,
@@ -50,6 +46,12 @@
             setattr(
                 self,
-                key.replace("-", "_").replace(".", "_"),
+                key_format(key),
+                config_parser.get(section, key, fallback="").split(),
+            )
+        for key in ("db_user", "db_password", "load-language"):
+            setattr(
+                self,
+                key_format(key),
                 config_parser.get(section, key, fallback=None),
             )
         self.registry = config_parser.get(