diff --git a/pwnlib/version.py b/pwnlib/version.py
index 5dd4a56c7..232862168 100644
--- a/pwnlib/version.py
+++ b/pwnlib/version.py
@@ -1 +1 @@
-__version__ = '3.1.0-beta'
+__version__ = '3.1.0-dev'
diff --git a/setup.py b/setup.py
index 5bcc94ec8..c54a486a6 100644
--- a/setup.py
+++ b/setup.py
@@ -59,7 +59,7 @@
 setup(
     name                 = 'pwntools',
     packages             = find_packages(),
-    version              = '3.1.0-beta',
+    version              = '3.1.0-dev',
     data_files           = [('',
                              ['LICENSE-pwntools.txt',
                              ]),