diff --git a/option_type.py b/option_type.py
index 79eb23f..c972998 100644
--- a/option_type.py
+++ b/option_type.py
@@ -1,2 +1,5 @@
-CALL = 'C'
-PUT = 'P'
\ No newline at end of file
+from enum import Enum
+
+class OptionType(Enum):
+    CALL = 'CALL'
+    PUT = 'PUT'
\ No newline at end of file