diff --git a/CMakeLists.txt b/CMakeLists.txt
index 71bad453..694910d1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required (VERSION 3.5)
 project (cint C)
 set(cint_VERSION_MAJOR "5")
-set(cint_VERSION_MINOR "4")
+set(cint_VERSION_MINOR "5")
 set(cint_VERSION_PATCH "0")
 set(cint_VERSION_TWEAK "0")
 set(cint_VERSION "${cint_VERSION_MAJOR}.${cint_VERSION_MINOR}.${cint_VERSION_PATCH}")
diff --git a/ChangeLog b/ChangeLog
index 0199316c..0bac66ce 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+Version 5.5.0 (2023-09-14):
+	* Fix memory leak issue in int4c1e
+	* Add polynomial root finder with eigenvalue algorithm
+	* Fitting Rys roots of SR integrals with Chebyshev polynomials
+	* New integrals related to LRESC
+	* Supports Gaussian model for int1e_grids
+
 Version 5.4.0 (2023-07-04):
 	* Add constant PTR_FRAC_CHARGE for QM/MM interface in pyscf
 
diff --git a/README.rst b/README.rst
index 5d7a1111..7a527644 100644
--- a/README.rst
+++ b/README.rst
@@ -1,8 +1,8 @@
 libcint
 =======
 
-version 5.4.0
-2023-07-04
+version 5.5.0
+2023-09-14
 
 
 What is libcint