diff --git a/isso/utils/hash.py b/isso/utils/hash.py
index 111916eac..58a953b36 100644
--- a/isso/utils/hash.py
+++ b/isso/utils/hash.py
@@ -3,7 +3,7 @@
 import codecs
 import hashlib
 
-from werkzeug.security import pbkdf2_bin as pbkdf2
+from hashlib import pbkdf2_hmac as pbkdf2
 
 
 def _TypeError(name, expected, val):
@@ -68,7 +68,8 @@ def __init__(self, salt=None, iterations=1000, dklen=6, func="sha1"):
         self.func = func
 
     def compute(self, val):
-        return pbkdf2(val, self.salt, self.iterations, self.dklen, self.func)
+        return pbkdf2(hash_name=self.func, password=val, salt=self.salt,
+                      iterations=self.iterations, dklen=self.dklen)
 
 
 def new(conf):