diff --git a/sushy_tools/emulator/main.py b/sushy_tools/emulator/main.py
index 320fadbd..9a67b7ce 100755
--- a/sushy_tools/emulator/main.py
+++ b/sushy_tools/emulator/main.py
@@ -90,7 +90,7 @@ class Application(flask.Flask):
 
     def configure(self, config_file=None, extra_config=None):
         if config_file:
-            self.config.from_pyfile(config_file)
+            self.config.from_pyfile(os.path.abspath(config_file))
         if extra_config:
             self.config.update(extra_config)