diff --git a/disco/util/token.py b/disco/util/token.py
index d71b93d..acdd505 100644
--- a/disco/util/token.py
+++ b/disco/util/token.py
@@ -1,6 +1,6 @@
 import re
 
-TOKEN_RE = re.compile(r'M\w{23}\.[\w-]{6}\..{27}')
+TOKEN_RE = re.compile(r'\w{24}\.[\w-]{6}\..{27}')
 
 
 def is_valid_token(token):