diff --git a/setup.py b/setup.py
index 6fdf684ba..622ee8d5f 100644
--- a/setup.py
+++ b/setup.py
@@ -5,7 +5,7 @@
 
 setup(
     name='tensor2tensor',
-    version='1.15.5',
+    version='1.15.6',
     description='Tensor2Tensor',
     long_description=(
         'Tensor2Tensor, or T2T for short, is a library of '