diff --git a/deno.jsonc b/deno.jsonc
index 804bd69..4e93d7b 100644
--- a/deno.jsonc
+++ b/deno.jsonc
@@ -1,6 +1,6 @@
 {
     "name": "@cross/jwt",
-    "version": "0.4.8",
+    "version": "0.4.9",
     "exports": "./mod.ts",
 
     "tasks": {
diff --git a/src/cryptokeys.ts b/src/cryptokeys.ts
index 4f9829b..360822f 100644
--- a/src/cryptokeys.ts
+++ b/src/cryptokeys.ts
@@ -228,7 +228,7 @@ export async function exportPEMKey(key: CryptoKey, filePathOrOptions?: string |
 
     const keyType = key.type;
 
-    const exportedKey = await window.crypto.subtle.exportKey(
+    const exportedKey = await crypto.subtle.exportKey(
         keyType === "private" ? "pkcs8" : "spki",
         key,
     );
@@ -291,7 +291,7 @@ export async function importPEMKey(keyDataOrPath: string, algorithm: SupportedKe
     const pemContents = pemString.substring(pemHeader.length, pemString.length - pemFooter.length);
     const binaryDer = decodeBase64(pemContents);
 
-    return await window.crypto.subtle.importKey(
+    return await crypto.subtle.importKey(
         keyType === "private" ? "pkcs8" : "spki",
         binaryDer,
         { ...algo },