diff --git a/client/src/pages/Expo.tsx b/client/src/pages/Expo.tsx
index a142247..f3ddb1f 100644
--- a/client/src/pages/Expo.tsx
+++ b/client/src/pages/Expo.tsx
@@ -123,7 +123,9 @@ const Expo = () => {
                     selected={track}
                     setSelected={setTrack}
                     onChange={(t) => {
-                        navigate('/expo/' + t.replace(/\s/g, '%20'));
+                        // encodeURIComponent handles spaces, slashes, and
+                        // any other reserved URL characters in track names.
+                        navigate('/expo/' + encodeURIComponent(t));
                     }}
                     options={challenges ?? []}
                     className="my-2 md:mx-0 mx-4"