diff --git a/libs/parser/rules/pslang.l b/libs/parser/rules/pslang.l
index 41a6998..474c597 100644
--- a/libs/parser/rules/pslang.l
+++ b/libs/parser/rules/pslang.l
@@ -107,13 +107,20 @@ f64  { return bp::make_f64(ctx.location); }
 [0-9]+\.[0-9]+h { return bp::make_lit_f16(yytext, ctx.location); }
 [0-9]+\.[0-9]+d { return bp::make_lit_f64(yytext, ctx.location); }
 
-'.' { return bp::make_lit_char8(yytext[1], ctx.location); }
+'\\0' { return bp::make_lit_char8(0, ctx.location); }
+'\\a' { return bp::make_lit_char8(7, ctx.location); }
+'\\b' { return bp::make_lit_char8(8, ctx.location); }
+'\\t' { return bp::make_lit_char8(9, ctx.location); }
 '\\n' { return bp::make_lit_char8(10, ctx.location); }
-'\\t' { return bp::make_lit_char8(11, ctx.location); }
+'\\v' { return bp::make_lit_char8(11, ctx.location); }
+'\\f' { return bp::make_lit_char8(12, ctx.location); }
 '\\r' { return bp::make_lit_char8(13, ctx.location); }
-'\\\"' { return bp::make_lit_char8(22, ctx.location); }
-'\\'' { return bp::make_lit_char8(27, ctx.location); }
-'\\\\' { return bp::make_lit_char8(134, ctx.location); }
+'\\e' { return bp::make_lit_char8(27, ctx.location); }
+'\\\"' { return bp::make_lit_char8(34, ctx.location); }
+'\\'' { return bp::make_lit_char8(39, ctx.location); }
+'\\?' { return bp::make_lit_char8(63, ctx.location); }
+'\\\\' { return bp::make_lit_char8(92, ctx.location); }
+'.' { return bp::make_lit_char8(yytext[1], ctx.location); }
 
 <<EOF>> { return bp::make_end(ctx.location); }