diff --git a/ziffers/classes.py b/ziffers/classes.py
index dbef906..3f641df 100644
--- a/ziffers/classes.py
+++ b/ziffers/classes.py
@@ -737,6 +737,8 @@ class ListOperation(Sequence):
                         flattened_list.extend(item.evaluated_values)
                     else:
                         flattened_list.append(filter_operation(item))
+                elif isinstance(item, Range):
+                    flattened_list.extend(list(item.evaluate(options)))
                 elif isinstance(item, (Event, RandomInteger, Integer, Cyclic)):
                     flattened_list.append(item)
 
diff --git a/ziffers/parser.py b/ziffers/parser.py
index d185d13..758b4d9 100644
--- a/ziffers/parser.py
+++ b/ziffers/parser.py
@@ -1,5 +1,6 @@
 """ Module for the parser """
 from pathlib import Path
+from functools import lru_cache
 from lark import Lark
 from .classes import Ziffers
 from .mapper import ZiffersTransformer
@@ -29,7 +30,7 @@ def parse_expression(expr: str) -> Ziffers:
     """
     return ziffers_parser.parse(expr)
 
-
+@lru_cache
 def zparse(expr: str, **opts) -> Ziffers:
     """Parses ziffers expression with options