diff --git a/public/index/constants.js b/public/index/constants.js
index 8a8d8ea..4725a0e 100644
--- a/public/index/constants.js
+++ b/public/index/constants.js
@@ -21,7 +21,7 @@ export const SUPPORTED_FILE_TYPES = [
     name: "GIF",
     extensions: [".gif", "image/gif"],
     mimeType: "image/gif",
-    route: "gif",
+    route: "gif/",
     mimeSniffPatterns: [
       {
         bytes: [0x47, 0x49, 0x46, 0x38, 0x37, 0x61],
@@ -37,7 +37,7 @@ export const SUPPORTED_FILE_TYPES = [
     name: "PNG",
     extensions: [".png", ".apng"],
     mimeType: "image/png",
-    route: "png",
+    route: "png/",
     mimeSniffPatterns: [{
       bytes: [0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A],
       mask: [0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF],
diff --git a/test/index/routeFile.test.ts b/test/index/routeFile.test.ts
index 7d1622c..0d71771 100644
--- a/test/index/routeFile.test.ts
+++ b/test/index/routeFile.test.ts
@@ -21,16 +21,16 @@ Deno.test("routes files correctly", async () => {
     [new File([], "foo.txt"), null],
     [new File([], "foo.txt", { type: "text/plain" }), null],
     // GIF
-    [new File([], "foo", { type: "image/gif" }), "gif"],
-    [new File([], "foo.gif"), "gif"],
-    [new File([], "foo.gif", { type: "text/plain" }), "gif"],
-    [new File([GIF87_SIGNATURE], "foo"), "gif"],
-    [new File([GIF89_SIGNATURE], "foo"), "gif"],
+    [new File([], "foo", { type: "image/gif" }), "gif/"],
+    [new File([], "foo.gif"), "gif/"],
+    [new File([], "foo.gif", { type: "text/plain" }), "gif/"],
+    [new File([GIF87_SIGNATURE], "foo"), "gif/"],
+    [new File([GIF89_SIGNATURE], "foo"), "gif/"],
     // PNG
-    [new File([], "foo", { type: "image/png" }), "png"],
-    [new File([], "foo.png"), "png"],
-    [new File([], "foo.png", { type: "text/plain" }), "png"],
-    [new File([PNG_SIGNATURE], "foo"), "png"],
+    [new File([], "foo", { type: "image/png" }), "png/"],
+    [new File([], "foo.png"), "png/"],
+    [new File([], "foo.png", { type: "text/plain" }), "png/"],
+    [new File([PNG_SIGNATURE], "foo"), "png/"],
   ]);
 
   for (const [file, expected] of testCases) {