diff --git a/CHANGELOG.md b/CHANGELOG.md
index e395f6d..f9bf2ec 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@
   that include it.
 - Fix incorrect type signature for the EnvironDict type.
 
+#### Changes
+
+- Make the application ``Request`` class overridable.
+
 ### v0.8.2 (2021-03-21)
 
 #### Fixes
diff --git a/jetforce/app/base.py b/jetforce/app/base.py
index b42e598..ac42cf0 100644
--- a/jetforce/app/base.py
+++ b/jetforce/app/base.py
@@ -252,6 +252,8 @@ class JetforceApplication:
     rate_limiter: typing.Optional[RateLimiter]
     routes: typing.List[typing.Tuple[RoutePattern, RouteHandler]]
 
+    request_class: typing.Type[Request] = Request
+
     def __init__(self, rate_limiter: typing.Optional[RateLimiter] = None):
         self.rate_limiter = rate_limiter
         self.routes = []
@@ -260,7 +262,7 @@ class JetforceApplication:
         self, environ: EnvironDict, send_status: WriteStatusCallable
     ) -> ApplicationResponse:
         try:
-            request = Request(environ)
+            request = self.request_class(environ)
         except Exception:
             send_status(Status.BAD_REQUEST, "Invalid URL")
             return
diff --git a/tests/data/cgi-bin/debug.py b/tests/data/cgi-bin/debug.py
index 9eb8b4b..71db77e 100755
--- a/tests/data/cgi-bin/debug.py
+++ b/tests/data/cgi-bin/debug.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
-import os
 import json
+import os
 
 print("20 application/json")
 print(json.dumps(dict(os.environ)))