diff --git a/TsIniParser/pre_processor.lark.cache b/TsIniParser/pre_processor.lark.cache
index 8e1cff2..7eaf041 100644
Binary files a/TsIniParser/pre_processor.lark.cache and b/TsIniParser/pre_processor.lark.cache differ
diff --git a/TsIniParser/ts_ini.lark b/TsIniParser/ts_ini.lark
index 9798d14..be2e8e0 100644
--- a/TsIniParser/ts_ini.lark
+++ b/TsIniParser/ts_ini.lark
@@ -212,6 +212,7 @@ FLOATING_CONSTANT    : (FLOAT | SIGNED_FLOAT) "f"?
 // ============================ General  ============================
 
 ANY_VALUE      : /[^\n]+/
-KEY.-1         : (CNAME | ESCAPED_STRING) WS_INLINE? "="
+KEY.-1         : (KEY_NAME | ESCAPED_STRING) WS_INLINE? "="
+KEY_NAME       : ("_"|LETTER) ("_"|"-"|LETTER|DIGIT)*
 _EOL           : NEWLINE
 _identifier    : identifier
\ No newline at end of file
diff --git a/TsIniParser/ts_ini.lark.cache b/TsIniParser/ts_ini.lark.cache
index 87ab58d..c0a204f 100644
Binary files a/TsIniParser/ts_ini.lark.cache and b/TsIniParser/ts_ini.lark.cache differ