diff --git a/package-lock.json b/package-lock.json
index efd7b888..3e7eefb8 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
         "join-images": "1.1.5",
         "koa": "2.15.3",
         "koa-body": "6.0.1",
-        "koa-router": "12.0.1",
+        "koa-router": "13.0.1",
         "pg": "8.13.0",
         "promisify-child-process": "4.1.2",
         "sharp": "0.33.5",
@@ -5747,18 +5747,16 @@
       }
     },
     "node_modules/koa-router": {
-      "version": "12.0.1",
-      "resolved": "https://registry.npmjs.org/koa-router/-/koa-router-12.0.1.tgz",
-      "integrity": "sha512-gaDdj3GtzoLoeosacd50kBBTnnh3B9AYxDThQUo4sfUyXdOhY6ku1qyZKW88tQCRgc3Sw6ChXYXWZwwgjOxE0w==",
+      "version": "13.0.1",
+      "resolved": "https://registry.npmjs.org/koa-router/-/koa-router-13.0.1.tgz",
+      "integrity": "sha512-4/sijXdSxocIe2wv7RFFSxvo2ic1pDzPSmy11yCGztng1hx408qfw1wVmN3aqhQaU7U6nJ039JKC8ObE73Ohgw==",
       "dependencies": {
-        "debug": "^4.3.4",
         "http-errors": "^2.0.0",
         "koa-compose": "^4.1.0",
-        "methods": "^1.1.2",
-        "path-to-regexp": "^6.2.1"
+        "path-to-regexp": "^8.1.0"
       },
       "engines": {
-        "node": ">= 12"
+        "node": ">= 18"
       }
     },
     "node_modules/koa-router/node_modules/http-errors": {
@@ -5935,14 +5933,6 @@
         "node": ">= 8"
       }
     },
-    "node_modules/methods": {
-      "version": "1.1.2",
-      "resolved": "https://registry.npmjs.org/methods/-/methods-1.1.2.tgz",
-      "integrity": "sha512-iclAHeNqNm68zFtnZ0e+1L2yUIdvzNoauKU4WBA3VvH/vPFieF7qfRlwUZU+DA9P9bPXIS90ulxoUoCH23sV2w==",
-      "engines": {
-        "node": ">= 0.6"
-      }
-    },
     "node_modules/micromatch": {
       "version": "4.0.5",
       "resolved": "https://registry.npmjs.org/micromatch/-/micromatch-4.0.5.tgz",
@@ -6473,9 +6463,12 @@
       "dev": true
     },
     "node_modules/path-to-regexp": {
-      "version": "6.2.1",
-      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-6.2.1.tgz",
-      "integrity": "sha512-JLyh7xT1kizaEvcaXOQwOc2/Yhw6KZOvPf1S8401UyLk86CU79LN3vl7ztXGm/pZ+YjoyAJ4rxmHwbkBXJX+yw=="
+      "version": "8.2.0",
+      "resolved": "https://registry.npmjs.org/path-to-regexp/-/path-to-regexp-8.2.0.tgz",
+      "integrity": "sha512-TdrF7fW9Rphjq4RjrW0Kp2AW0Ahwu9sRGTkS6bvDi0SCwZlEZYmcfDbEsTz8RVk0EHIS/Vd1bv3JhG+1xZuAyQ==",
+      "engines": {
+        "node": ">=16"
+      }
     },
     "node_modules/path-type": {
       "version": "4.0.0",
diff --git a/package.json b/package.json
index 0192b16a..c036bf40 100644
--- a/package.json
+++ b/package.json
@@ -21,7 +21,7 @@
     "join-images": "1.1.5",
     "koa": "2.15.3",
     "koa-body": "6.0.1",
-    "koa-router": "12.0.1",
+    "koa-router": "13.0.1",
     "pg": "8.13.0",
     "promisify-child-process": "4.1.2",
     "sharp": "0.33.5",
diff --git a/src/index.ts b/src/index.ts
index 1c2f2510..2561348f 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -162,9 +162,9 @@ router.post(
 );
 
 if (DEV) {
-  router.get(`${siteConfig.staticUrl}/:filename*`, serveStaticResource);
-  router.get(`/shared/:filename*`, serveStaticSharedResource);
-  router.get(`/src/frontend/:filename*`, serveViewJs);
+  router.get(`${siteConfig.staticUrl}/*filename`, serveStaticResource);
+  router.get(`/shared/*filename`, serveStaticSharedResource);
+  router.get(`/src/frontend/*filename`, serveViewJs);
   router.get(
     `${siteConfig.reportsUrl}/:change/figure-html/:filename`,
     serveReport