diff --git a/debugger/dap_debug_service.ts b/debugger/dap_debug_service.ts
index e9dcc68c3c..8f4294b5be 100644
--- a/debugger/dap_debug_service.ts
+++ b/debugger/dap_debug_service.ts
@@ -213,7 +213,7 @@ async function getPublicKey(): Promise<CryptoKey | null> {
 			}
 
 			// Decode the public key from base64url
-			const publicKeyBytes = Uint8Array.from(atob(jwk.x.replace(/-/g, '+').replace(/_/g, '/')), c => c.charCodeAt(0))
+			const publicKeyBytes = base64urlDecode(jwk.x)
 
 			// Import as Ed25519 public key
 			const key = await crypto.subtle.importKey(
diff --git a/debugger/dap_websocket_server_bun.ts b/debugger/dap_websocket_server_bun.ts
index 8db0d853ce..5838be2bad 100644
--- a/debugger/dap_websocket_server_bun.ts
+++ b/debugger/dap_websocket_server_bun.ts
@@ -186,7 +186,7 @@ async function getPublicKey(): Promise<CryptoKey | null> {
 			}
 
 			// Decode the public key from base64url
-			const publicKeyBytes = Uint8Array.from(atob(jwk.x.replace(/-/g, '+').replace(/_/g, '/')), c => c.charCodeAt(0))
+			const publicKeyBytes = base64urlDecode(jwk.x)
 
 			// Import as Ed25519 public key
 			const key = await crypto.subtle.importKey(