diff --git a/pgfw/Configuration.py b/pgfw/Configuration.py
index 6bbdaeb..7d0e743 100644
--- a/pgfw/Configuration.py
+++ b/pgfw/Configuration.py
@@ -24,6 +24,7 @@ class Configuration(RawConfigParser):
         self.set_type_declarations(type_declarations)
         self.set_defaults()
         self.read_project_config_file()
+        self.merge_command_line()
         self.modify_defaults()
         self.print_debug(self)