diff --git a/app/util.py b/app/util.py
index b5b1ff1..03c8a96 100644
--- a/app/util.py
+++ b/app/util.py
@@ -46,9 +46,10 @@ class NV:
         self.log = logging.getLogger(self.__class__.__name__)
 
         if NV.__DRIVER_MATRIX is None:
+            from os.path import join, dirname
             from json import load as json_load
             try:
-                file = open(NV.__DRIVER_MATRIX_FILENAME)
+                file = open(join(dirname(__file__), NV.__DRIVER_MATRIX_FILENAME))
                 NV.__DRIVER_MATRIX = json_load(file)
                 file.close()
                 self.log.debug(f'Successfully loaded "{NV.__DRIVER_MATRIX_FILENAME}".')