diff --git a/docs/version.py b/docs/version.py
index 90eedb0..2471606 100644
--- a/docs/version.py
+++ b/docs/version.py
@@ -5,4 +5,4 @@
 #    @Pip-Library: https://pypi.org/project/ndn-storage
 
 # Version of Storage according to pip
-__version__ = "0.1.7"
\ No newline at end of file
+__version__ = "0.1.8"
\ No newline at end of file
diff --git a/src/ndn/storage/storage.py b/src/ndn/storage/storage.py
index 0fc2ed8..00db1dd 100644
--- a/src/ndn/storage/storage.py
+++ b/src/ndn/storage/storage.py
@@ -14,7 +14,7 @@
 
 class Storage(ABC):
     def __init__(self) -> None:
-        cache:NameTrie = NameTrie()
+        self.cache:NameTrie = NameTrie()
     @staticmethod
     def _time_ms() -> int:
         return int(get_time() * 1000)