diff --git a/slow/slow.py b/slow/slow.py
index 4eee55a..5fccceb 100644
--- a/slow/slow.py
+++ b/slow/slow.py
@@ -331,7 +331,7 @@ def render(
 
 
 def redirect(location: str):  # TODO Move to another module
-    return Response(307, ["Location: {location}"], b"")
+    return Response(307, [f"Location: {location}"], b"")
 
 
 def JSONAPI(func):  # TODO Move to another module