diff --git a/api/package.json b/api/package.json
index 1df49a2f4..1b4971a3f 100644
--- a/api/package.json
+++ b/api/package.json
@@ -30,8 +30,7 @@
     "ical-generator": "^3.2.1",
     "postgraphile": "^4.11.0",
     "postgraphile-plugin-connection-filter": "^2.1.1",
-    "postgres-migrations": "^5.3.0",
-    "slugify": "^1.6.5"
+    "postgres-migrations": "^5.3.0"
   },
   "devDependencies": {
     "@types/express": "^4.17.11",
diff --git a/api/src/routes/ical.ts b/api/src/routes/ical.ts
index 80bc1fb0a..f5a58f47e 100644
--- a/api/src/routes/ical.ts
+++ b/api/src/routes/ical.ts
@@ -1,7 +1,6 @@
 import { ICalCalendar } from "ical-generator";
 import { Request, Response, Handler } from "express";
 import { Pool } from "pg";
-import slugify from "slugify";
 
 type CtfRow = {
   id: number;
@@ -53,18 +52,17 @@ export function icalRoute(pool: Pool): Handler {
     const ctfs = await getCtfs();
 
     for (const ctf of ctfs) {
-      // I'm not sure if this works in all cases (e.g. if ctfs aren't at /#/ctf/<id> but at /ctfnote/#/ctf/<id>...)
-      const ctf_url = new URL(
-        `/#/ctf/${ctf.id}-${slugify(ctf.title)}/info`,
-        `${req.protocol}://${req.headers.host}`
-      );
+
+      const proto = req.headers["x-forwarded-proto"] || req.protocol;
+      const host = req.headers["x-forwarded-host"] || req.headers.host;
+      const ctf_url = `${proto}://${host}/#/ctf/${ctf.id}/info`;
 
       cal.createEvent({
         start: ctf.start_time,
         end: ctf.end_time,
         description: ctf.description,
         summary: ctf.title,
-        url: ctf_url.href,
+        url: ctf_url,
       });
     }
 
diff --git a/api/yarn.lock b/api/yarn.lock
index 59cba001a..6a1aaa082 100644
--- a/api/yarn.lock
+++ b/api/yarn.lock
@@ -2616,11 +2616,6 @@ slice-ansi@^4.0.0:
     astral-regex "^2.0.0"
     is-fullwidth-code-point "^3.0.0"
 
-slugify@^1.6.5:
-  version "1.6.5"
-  resolved "https://registry.yarnpkg.com/slugify/-/slugify-1.6.5.tgz#c8f5c072bf2135b80703589b39a3d41451fbe8c8"
-  integrity sha512-8mo9bslnBO3tr5PEVFzMPIWwWnipGS0xVbYf65zxDqfNwmzYn1LpiKNrR6DlClusuvo+hDHd1zKpmfAe83NQSQ==
-
 source-map-support@^0.5.17:
   version "0.5.21"
   resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.21.tgz#04fe7c7f9e1ed2d662233c28cb2b35b9f63f6e4f"
diff --git a/front/nginx.conf b/front/nginx.conf
index b67b12bfb..d476313aa 100644
--- a/front/nginx.conf
+++ b/front/nginx.conf
@@ -22,6 +22,8 @@ server {
         proxy_set_header Connection $http_connection;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-Host $host;
         add_header Pragma "no-cache";
     }
 
@@ -33,6 +35,8 @@ server {
         proxy_set_header Connection $http_connection;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-Host $host;
         add_header Pragma "no-cache";
     }
 
@@ -44,6 +48,8 @@ server {
         proxy_set_header Connection $http_connection;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-Host $host;
         add_header Pragma "no-cache";
     }
 
@@ -55,6 +61,8 @@ server {
         proxy_set_header Connection $http_connection;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
+        proxy_set_header X-Forwarded-Host $host;
         add_header Pragma "no-cache";
     }
 
diff --git a/front/src/router/routes.ts b/front/src/router/routes.ts
index d704a9a48..577261db1 100644
--- a/front/src/router/routes.ts
+++ b/front/src/router/routes.ts
@@ -35,6 +35,7 @@ const ctfsRoute: RouteRecordRaw = {
 
 const ctfRoute: RouteRecordRaw = {
   path: 'ctf/:ctfId(\\d+)-:ctfSlug',
+  alias: ['ctf/:ctfId(\\d+)'],
   name: 'ctf',
   redirect: { name: 'ctf-info' },
   props: {
@@ -54,6 +55,7 @@ const ctfRoute: RouteRecordRaw = {
   children: [
     {
       path: 'task/:taskId(\\d+)-:taskSlug',
+      alias: ['task/:taskId(\\d+)'],
       name: 'task',
       props: (route) => ({ taskId: parseInt(route.params.taskId as string) }),
       component: () => import('pages/Task.vue'),