diff --git a/routes/dir/[...path].tsx b/routes/dir/[...path].tsx
index bbe0b01..93f4642 100644
--- a/routes/dir/[...path].tsx
+++ b/routes/dir/[...path].tsx
@@ -1,6 +1,10 @@
 import { HandlerContext, Handlers, PageProps } from "$fresh/server.ts";
-import { asset, Head } from "$fresh/runtime.ts";
-import { encodePath, removePrefixFromPathname } from "../../util/util.ts";
+import { Head } from "$fresh/runtime.ts";
+import {
+  decodePath,
+  encodePath,
+  removePrefixFromPathname,
+} from "../../util/util.ts";
 import { join } from "path/posix.ts";
 import DirList, { EntryInfo } from "../../islands/DirList.tsx";
 import FileViewer from "../../islands/FileViewer.tsx";
@@ -127,7 +131,7 @@ async function GET(req: Request, ctx: HandlerContext): Promise<Response> {
     }
   }
   const url = new URL(req.url);
-  const path = removePrefixFromPathname(decodeURI(url.pathname), "/dir");
+  const path = removePrefixFromPathname(decodePath(url.pathname), "/dir");
   if (url.searchParams.has("pretty")) {
     return await renderPage(req, path, ctx);
   } else {
diff --git a/test_data/h#1/SUMMARY.md b/test_data/h#1/SUMMARY.md
new file mode 100644
index 0000000..384d650
--- /dev/null
+++ b/test_data/h#1/SUMMARY.md
@@ -0,0 +1,41 @@
+---
+title: Q&A
+tags: ["Q&A"]
+---
+
+# Q&A
+
+## Q1
+
+What is the default branch name?
+
+## A1
+
+The default branch name is `master`. You can change it to any name you like. For
+example, you can change it to `main` by following the steps below:
+
+```
+git branch -m master main
+git fetch origin
+git branch -u origin/main main
+git remote set-head origin -a
+```
+
+## Q2
+
+What is the defference between `git branch` and `git branch -a`?
+
+## A2
+
+`git branch` shows only local branches, while `git branch -a` shows both local
+and remote branches.
+
+## Q3
+
+Fast-forward merge is not possible. How can I merge the feature branch into the
+main branch?
+
+## A3
+
+You can use `--no-ff` option to force a merge commit even if the merge is a
+fast-forward.
diff --git a/util/util.ts b/util/util.ts
index bb58035..c718bda 100644
--- a/util/util.ts
+++ b/util/util.ts
@@ -16,3 +16,7 @@ export function removePrefixFromPathname(
 export function encodePath(path: string): string {
   return path.split("/").map(encodeURIComponent).join("/");
 }
+
+export function decodePath(path: string): string {
+  return path.split("/").map(decodeURIComponent).join("/");
+}