diff --git a/deno_dist/router/pattern-router/router.ts b/deno_dist/router/pattern-router/router.ts
index e7d0d60d..bdd1a66e 100644
--- a/deno_dist/router/pattern-router/router.ts
+++ b/deno_dist/router/pattern-router/router.ts
@@ -8,7 +8,7 @@ export class PatternRouter<T> implements Router<T> {
   private dNames: Record<string, number> = {} // Short name of duplicatedNames
 
   add(method: string, path: string, handler: T) {
-    const endsWithWildcard = path.endsWith('*')
+    const endsWithWildcard = path[path.length - 1] === '*'
     if (endsWithWildcard) {
       path = path.slice(0, -2)
     }
diff --git a/deno_dist/utils/url.ts b/deno_dist/utils/url.ts
index c1827406..a6ae93c6 100644
--- a/deno_dist/utils/url.ts
+++ b/deno_dist/utils/url.ts
@@ -87,13 +87,13 @@ export const mergePath = (...paths: string[]): string => {
 
   for (let path of paths) {
     /* ['/hey/','/say'] => ['/hey', '/say'] */
-    if (p.endsWith('/')) {
+    if (p[p.length - 1] === '/') {
       p = p.slice(0, -1)
       endsWithSlash = true
     }
 
     /* ['/hey','say'] => ['/hey', '/say'] */
-    if (!path.startsWith('/')) {
+    if (path[0] !== '/') {
       path = `/${path}`
     }
 
diff --git a/src/router/pattern-router/router.ts b/src/router/pattern-router/router.ts
index 0d0cf62b..edecd74c 100644
--- a/src/router/pattern-router/router.ts
+++ b/src/router/pattern-router/router.ts
@@ -8,7 +8,7 @@ export class PatternRouter<T> implements Router<T> {
   private dNames: Record<string, number> = {} // Short name of duplicatedNames
 
   add(method: string, path: string, handler: T) {
-    const endsWithWildcard = path.endsWith('*')
+    const endsWithWildcard = path[path.length - 1] === '*'
     if (endsWithWildcard) {
       path = path.slice(0, -2)
     }
diff --git a/src/utils/url.ts b/src/utils/url.ts
index c1827406..a6ae93c6 100644
--- a/src/utils/url.ts
+++ b/src/utils/url.ts
@@ -87,13 +87,13 @@ export const mergePath = (...paths: string[]): string => {
 
   for (let path of paths) {
     /* ['/hey/','/say'] => ['/hey', '/say'] */
-    if (p.endsWith('/')) {
+    if (p[p.length - 1] === '/') {
       p = p.slice(0, -1)
       endsWithSlash = true
     }
 
     /* ['/hey','say'] => ['/hey', '/say'] */
-    if (!path.startsWith('/')) {
+    if (path[0] !== '/') {
       path = `/${path}`
     }