diff --git a/main.py b/main.py
index dc45e01..1c17923 100644
--- a/main.py
+++ b/main.py
@@ -2,9 +2,13 @@
 from cryptography.hazmat.primitives import hashes
 from cryptography.hazmat.backends import default_backend
 from cryptography.exceptions import InvalidKey, InvalidTag
-from ed25519 import BadSignatureError
+
+
+from nacl.signing import VerifyKey 
+from nacl.exceptions import BadSignatureError
+
 import argparse
-import ed25519
+#import ed25519
 import base64
 import json
 import sys
@@ -47,14 +51,13 @@
 
 # Verify using Ed25519
 try:
-  verify_key = ed25519.VerifyingKey(
-    os.environ['KEYGEN_PUBLIC_KEY'].encode(),
-    encoding='hex',
+  verify_key = VerifyKey(
+    bytes.fromhex(os.environ['KEYGEN_PUBLIC_KEY'])
   )
 
   verify_key.verify(
-    base64.b64decode(sig),
     ('license/%s' % enc).encode(),
+    base64.b64decode(sig),
   )
 except (AssertionError, BadSignatureError):
   print('[error] verification failed!')
diff --git a/requirements.txt b/requirements.txt
index 45dcc28..5705f08 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 argparse
 cryptography
-ed25519
+#ed25519
+pynacl
\ No newline at end of file