diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 4fb31f3..6286c66 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -2,6 +2,10 @@
 History
 =======
 
+0.92.1 (2023-12-24)
+-------------------
+* Fixed _get_matched_keys access for ReadOnlyCachedModel
+
 0.92.0 (2023-12-23)
 -------------------
 * site_ctx implementation for FastAPI
diff --git a/apphelpers/__init__.py b/apphelpers/__init__.py
index d6c55bc..7dcdbd8 100644
--- a/apphelpers/__init__.py
+++ b/apphelpers/__init__.py
@@ -4,4 +4,4 @@
 
 __author__ = """Scroll Tech"""
 __email__ = "engg@stck.me"
-__version__ = "0.92.0"
+__version__ = "0.92.1"
diff --git a/apphelpers/utilities/caching.py b/apphelpers/utilities/caching.py
index ac2f9f4..de30b00 100644
--- a/apphelpers/utilities/caching.py
+++ b/apphelpers/utilities/caching.py
@@ -21,31 +21,38 @@ class ReadOnlyCachedModel:
     key_fields: ClassVar[List[str]]
 
     @classmethod
-    def prefix_key(cls, data: dict) -> str:
+    def _prefix_key(cls, data: dict) -> str:
         key = cls.ns
         for _field in cls.key_fields:
             key += f":{data[_field]}"
         return key
 
+    @classmethod
+    def _get_matched_keys(cls, data: dict) -> List[str]:
+        pattern = cls.ns
+        for _field in cls.key_fields:
+            pattern += f':{data.get(_field, "*")}'
+        return cls.connection.keys(pattern)  # type: ignore
+
     @classmethod
     def get(cls, **data: Any) -> Optional[dict]:
-        key = cls.prefix_key(data)
+        key = cls._prefix_key(data)
         value: Any = cls.connection.get(key)
         return json.loads(value) if value else None
 
     @classmethod
     def exists(cls, **data: Any) -> bool:
-        key = cls.prefix_key(data)
+        key = cls._prefix_key(data)
         return cls.connection.exists(key)  # type: ignore
 
     @classmethod
     def get_count(cls, **data: Any) -> int:
-        key: Any = cls.prefix_key(data)
+        key: Any = cls._prefix_key(data)
         count: Optional[Any] = cls.connection.get(key)
         return int(count) if count else 0
 
     @classmethod
-    def count_matched_keys(cls, **data) -> int:
+    def count_matched_keys(cls, **data: Any) -> int:
         keys = cls._get_matched_keys(data)
         return len(keys)
 
@@ -57,54 +64,47 @@ class ReadWriteCachedModel(ReadOnlyCachedModel):
 
     timeout: ClassVar[Optional[int]] = None
 
-    @classmethod
-    def _get_matched_keys(cls, data: dict) -> List[str]:
-        pattern = cls.ns
-        for _field in cls.key_fields:
-            pattern += f':{data.get(_field, "*")}'
-        return cls.connection.keys(pattern)  # type: ignore
-
     @classmethod
     def create(cls, **data: Any):
-        key = cls.prefix_key(data)
+        key = cls._prefix_key(data)
         cls.connection.set(key, json.dumps(data))
         if cls.timeout:
             cls.connection.expire(key, cls.timeout)
 
     @classmethod
     def create_lookup(cls, **data: Any):
-        key = cls.prefix_key(data)
+        key = cls._prefix_key(data)
         cls.connection.set(key, 1)
         if cls.timeout:
             cls.connection.expire(key, cls.timeout)
 
     @classmethod
     def create_counter(cls, starting=1, **data: Any):
-        key = cls.prefix_key(data)
+        key = cls._prefix_key(data)
         cls.connection.set(key, starting)
         if cls.timeout:
             cls.connection.expire(key, cls.timeout)
 
     @classmethod
     def update(cls, **data):
-        # key = cls.prefix_key(data)
+        # key = cls._prefix_key(data)
         # NOTE: keepttl works only with Redis 6.0+
         # cls.connection.set(key, json.dumps(data), keepttl=True)
         cls.create(**data)
 
     @classmethod
     def increment(cls, amount=1, **data):
-        key = cls.prefix_key(data)
+        key = cls._prefix_key(data)
         cls.connection.incr(key, amount)
 
     @classmethod
     def decrement(cls, amount=1, **data):
-        key = cls.prefix_key(data)
+        key = cls._prefix_key(data)
         cls.connection.decr(key, amount)
 
     @classmethod
     def delete(cls, **data):
-        key = cls.prefix_key(data)
+        key = cls._prefix_key(data)
         cls.connection.delete(key)
 
     @classmethod
diff --git a/setup.cfg b/setup.cfg
index c2eadfe..21d882f 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.92.0
+current_version = 0.92.1
 commit = True
 tag = True
 
diff --git a/setup.py b/setup.py
index e7212e8..3c31777 100644
--- a/setup.py
+++ b/setup.py
@@ -42,6 +42,6 @@
     test_suite="tests",
     tests_require=test_requirements,
     url="https://github.com/scrolltech/apphelpers",
-    version="0.92.0",
+    version="0.92.1",
     zip_safe=False,
 )