diff --git a/trailminator/nlu.py b/trailminator/nlu.py
index 797c759..a293857 100644
--- a/trailminator/nlu.py
+++ b/trailminator/nlu.py
@@ -3,7 +3,9 @@ import jsgf
 
 class Nlu:
     def __init__(self):
-        self.rules_grammar = jsgf.parse_grammar_file('rules.jsgf')
+        with open('rules.jsgf', 'r', encoding='utf-8') as f:
+            lines = f.readlines()
+        self.rules_grammar = jsgf.parse_grammar_string("".join(lines))
         self.acts = {
             "request": {
                 'triggers': ['jak', 'kiedy'],