diff --git a/568.misc b/568.misc
new file mode 100644
index 00000000..5fe0165d
--- /dev/null
+++ b/568.misc
@@ -0,0 +1 @@
+Update type comments to type annotations.
diff --git a/django_redis/client/default.py b/django_redis/client/default.py
index eb62d8ec..1df90a27 100644
--- a/django_redis/client/default.py
+++ b/django_redis/client/default.py
@@ -42,7 +42,7 @@ def __init__(self, server, params: Dict[str, Any], backend: BaseCache) -> None:
         if not isinstance(self._server, (list, tuple, set)):
             self._server = self._server.split(",")
 
-        self._clients = [None] * len(self._server)  # type: List[Optional[Redis]]
+        self._clients: List[Optional[Redis]] = [None] * len(self._server)
         self._options = params.get("OPTIONS", {})
         self._replica_read_only = self._options.get("REPLICA_READ_ONLY", True)
 
@@ -146,7 +146,7 @@ def set(
             timeout = self._backend.default_timeout
 
         original_client = client
-        tried = []  # type: List[int]
+        tried: List[int] = []
         while True:
             try:
                 if client is None:
diff --git a/django_redis/hash_ring.py b/django_redis/hash_ring.py
index 5260b275..be456f7e 100644
--- a/django_redis/hash_ring.py
+++ b/django_redis/hash_ring.py
@@ -4,7 +4,7 @@
 
 
 class HashRing:
-    nodes = []  # type: List[str]
+    nodes: List[str] = []
 
     def __init__(self, nodes: Iterable[str] = (), replicas: int = 128) -> None:
         self.replicas: int = replicas
diff --git a/django_redis/pool.py b/django_redis/pool.py
index 0cbd0592..dda3b945 100644
--- a/django_redis/pool.py
+++ b/django_redis/pool.py
@@ -17,7 +17,7 @@ class ConnectionFactory:
     # ConnectionFactory is instantiated, as Django creates new cache client
     # (DefaultClient) instance for every request.
 
-    _pools = {}  # type: Dict[str, Redis]
+    _pools: Dict[str, Redis] = {}
 
     def __init__(self, options):
         pool_cls_path = options.get(