diff --git a/INSTALL b/INSTALL
index 290a3c5..f89e960 100644
--- a/INSTALL
+++ b/INSTALL
@@ -2,7 +2,7 @@
 Mininet Installation/Configuration Notes
 ----------------------------------------
 
-Mininet 2.3.1b2
+Mininet 2.3.1b3
 ---
 
 The supported installation methods for Mininet are 1) using a
diff --git a/README.md b/README.md
index d4a11a7..5992f27 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@ Mininet: Rapid Prototyping for Software Defined Networks
 ========================================================
 *The best way to emulate almost any network on your laptop!*
 
-Mininet 2.3.1b2
+Mininet 2.3.1b3
 
 [![Build Status][1]](https://github.com/mininet/mininet/actions)
 
@@ -70,7 +70,7 @@ Mininet includes:
 
 ### Python 3 Support
 
-- Mininet 2.3.1b2 supports Python 3 and Python 2
+- Mininet 2.3.1b3 supports Python 3 and Python 2
 
 - You can install both the Python 3 and Python 2 versions of
 Mininet side by side, but the most recent installation will
diff --git a/mininet/net.py b/mininet/net.py
index 55349ae..8f867b1 100755
--- a/mininet/net.py
+++ b/mininet/net.py
@@ -109,7 +109,7 @@ from mininet.util import ( quietRun, fixLimits, numCores, ensureRoot,
 from mininet.term import cleanUpScreens, makeTerms
 
 # Mininet version: should be consistent with README and LICENSE
-VERSION = "2.3.1b2"
+VERSION = "2.3.1b3"
 
 class Mininet( object ):
     "Network emulation with hosts spawned in network namespaces."