diff --git a/Lib/ldap/pkginfo.py b/Lib/ldap/pkginfo.py
index da891b3..378700d 100644
--- a/Lib/ldap/pkginfo.py
+++ b/Lib/ldap/pkginfo.py
@@ -2,6 +2,6 @@
 """
 meta attributes for packaging which does not import any dependencies
 """
-__version__ = '2.5.2'
+__version__ = '3.0.0b1'
 __author__ = u'python-ldap project'
 __license__ = 'Python style'
diff --git a/Lib/ldapurl.py b/Lib/ldapurl.py
index 366e177..9c051a1 100644
--- a/Lib/ldapurl.py
+++ b/Lib/ldapurl.py
@@ -4,7 +4,7 @@
 See https://www.python-ldap.org/ for details.
 """
 
-__version__ = '2.5.2'
+__version__ = '3.0.0b1'
 
 __all__ = [
   # constants
diff --git a/Lib/ldif.py b/Lib/ldif.py
index 4735bfb..fe14895 100644
--- a/Lib/ldif.py
+++ b/Lib/ldif.py
@@ -6,7 +6,7 @@
 
 from __future__ import unicode_literals
 
-__version__ = '2.5.2'
+__version__ = '3.0.0b1'
 
 __all__ = [
   # constants
diff --git a/Lib/slapdtest.py b/Lib/slapdtest.py
index ee1fbb2..cd142f6 100644
--- a/Lib/slapdtest.py
+++ b/Lib/slapdtest.py
@@ -7,7 +7,7 @@
 
 from __future__ import unicode_literals
 
-__version__ = '2.5.2'
+__version__ = '3.0.0b1'
 
 import os
 import socket