diff --git a/lib/engine.js b/lib/engine.js
index a697d6e..0cf4c91 100644
--- a/lib/engine.js
+++ b/lib/engine.js
@@ -20,10 +20,10 @@ function middie (complete) {
 
     let regexp
     if (url) {
-      const pathRegExp = pathToRegexp(sanitizePrefixUrl(url), {
-        end: false
+      regexp = pathToRegexp(sanitizePrefixUrl(url), [], {
+        end: false,
+        strict: true
       })
-      regexp = pathRegExp.regexp
     }
 
     if (Array.isArray(f)) {
diff --git a/package.json b/package.json
index 289a6da..00d54ae 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
   "dependencies": {
     "@fastify/error": "^3.2.0",
     "fastify-plugin": "^4.0.0",
-    "path-to-regexp": "^8.1.0",
+    "path-to-regexp": "^6.3.0",
     "reusify": "^1.0.4"
   },
   "publishConfig": {