diff --git a/src/lexer/lexer.c b/src/lexer/lexer.c
index 7dd85f8..45c37db 100644
--- a/src/lexer/lexer.c
+++ b/src/lexer/lexer.c
@@ -370,23 +370,7 @@ bool strequal(const char *const first, const char *const second) {
 }
 
 bool is_valid_hex_char(const char input) {
-  switch (input) {
-  case 'A':
-  case 'B':
-  case 'C':
-  case 'D':
-  case 'E':
-  case 'F':
-  case 'a':
-  case 'b':
-  case 'c':
-  case 'd':
-  case 'e':
-  case 'f':
-    return true;
-  }
-
-  return false;
+  return (input >= 'A' && input <= 'F') || (input >= 'a' && input <= 'e');
 }
 
 bool ishex(const char input) {