diff --git a/quartz/util/path.test.ts b/quartz/util/path.test.ts
index 18edc940..16e0311d 100644
--- a/quartz/util/path.test.ts
+++ b/quartz/util/path.test.ts
@@ -105,6 +105,8 @@ describe("transforms", () => {
         ["index.md", "index"],
         ["test.mp4", "test.mp4"],
         ["note with spaces.md", "note-with-spaces"],
+        ["test/special chars?.md", "test/special-chars-q"],
+        ["test/special chars #3.md", "test/special-chars-3"],
       ],
       path.slugifyFilePath,
       path.isFilePath,
diff --git a/quartz/util/path.ts b/quartz/util/path.ts
index 6cedffdb..95acf119 100644
--- a/quartz/util/path.ts
+++ b/quartz/util/path.ts
@@ -50,7 +50,9 @@ export function getFullSlug(window: Window): FullSlug {
 function sluggify(s: string): string {
   return s
     .split("/")
-    .map((segment) => segment.replace(/\s/g, "-").replace(/%/g, "-percent").replace(/\?/g, "-q")) // slugify all segments
+    .map((segment) =>
+      segment.replace(/\s/g, "-").replace(/%/g, "-percent").replace(/\?/g, "-q").replace(/#/g, ""),
+    ) // slugify all segments
     .join("/") // always use / as sep
     .replace(/\/$/, "")
 }