diff --git a/CMakeLists.txt b/CMakeLists.txt
index 3f6d78b9..81586e0d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required (VERSION 2.6)
 project (cint C)
 set(cint_VERSION_MAJOR "4")
 set(cint_VERSION_MINOR "0")
-set(cint_VERSION_PATCH "5")
+set(cint_VERSION_PATCH "6")
 set(cint_VERSION_TWEAK "0")
 set(cint_VERSION "${cint_VERSION_MAJOR}.${cint_VERSION_MINOR}.${cint_VERSION_PATCH}")
 set(cint_SOVERSION "${cint_VERSION_MAJOR}")
diff --git a/ChangeLog b/ChangeLog
index 857feaa5..80d12eaf 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,5 @@
+Version 4.0.6  (2020-11-13):
+	* Fix return value bug in rysroots
 Version 4.0.5  (2020-10-30):
 	* Fix prescreening bug in int3c2e
 Version 4.0.4  (2020-10-29):
diff --git a/README b/README
index 4911cb8a..c928d8b5 100644
--- a/README
+++ b/README
@@ -1,8 +1,8 @@
 libcint
 =======
 
-version 4.0.5
-2020-10-30
+version 4.0.6
+2020-11-13
 
 
 What is libcint