diff --git a/slowapi/extension.py b/slowapi/extension.py
index 78bad1b..3214624 100644
--- a/slowapi/extension.py
+++ b/slowapi/extension.py
@@ -237,7 +237,7 @@ class Limiter:
             C.HEADERS_ENABLED, False
         )
         self._storage_options.update(self.get_app_config(C.STORAGE_OPTIONS, {}))
-        self._storage: Union[Storage, AsyncStorage] = storage_from_string(
+        self._storage = storage_from_string(
             self._storage_uri or self.get_app_config(C.STORAGE_URL, "memory://"),
             **self._storage_options,
         )
@@ -334,7 +334,11 @@ class Limiter:
         """
         Place holder until we find a better way to load config from app
         """
-        return self.app_config(key, default=default_value, cast=type(default_value))
+        return (
+            self.app_config(key, default=default_value, cast=type(default_value))
+            if default_value
+            else self.app_config(key, default=default_value)
+        )
 
     def __should_check_backend(self) -> bool:
         if self.__check_backend_count > MAX_BACKEND_CHECKS:
diff --git a/slowapi/util.py b/slowapi/util.py
index be6064b..8a5bdfc 100644
--- a/slowapi/util.py
+++ b/slowapi/util.py
@@ -1,3 +1,5 @@
+from typing import Optional
+
 from starlette.requests import Request
 
 
@@ -11,11 +13,17 @@ def get_ipaddr(request: Request) -> str:
     if "X_FORWARDED_FOR" in request.headers:
         return request.headers["X_FORWARDED_FOR"]
     else:
-        return request.client.host or "127.0.0.1"
+        if not request.client or not request.client.host:
+            return "127.0.0.1"
+
+        return request.client.host
 
 
 def get_remote_address(request: Request) -> str:
     """
     Returns the ip address for the current request (or 127.0.0.1 if none found)
     """
-    return request.client.host or "127.0.0.1"
+    if not request.client or not request.client.host:
+        return "127.0.0.1"
+
+    return request.client.host