diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a757d5b..eb944e7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,9 +8,9 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-18.04]
+        os: [macos-latest, ubuntu-20.04]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Set up Python 3.7
         uses: actions/setup-python@v2
         with:
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 56cd231..64973f3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,8 +1,8 @@
 cmake_minimum_required (VERSION 3.5)
 project (qcint C)
 set(qcint_VERSION_MAJOR "5")
-set(qcint_VERSION_MINOR "1")
-set(qcint_VERSION_PATCH "8")
+set(qcint_VERSION_MINOR "2")
+set(qcint_VERSION_PATCH "1")
 set(qcint_VERSION_TWEAK "0")
 set(qcint_VERSION "${qcint_VERSION_MAJOR}.${qcint_VERSION_MINOR}.${qcint_VERSION_PATCH}")
 set(qcint_SOVERSION "${qcint_VERSION_MAJOR}")
diff --git a/ChangeLog b/ChangeLog
index 4e628bb..8b49ab1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Version 5.2.1  (2023-03-09):
+	* Improve error handling for SR-ERI integrals
+	* Optimize SR-ERI integral screening
+	* Fix approx_log bug for non-x86 architecture
+
 Version 5.1.8  (2023-01-03):
 	* Fix integer overflow error in cintopt initialization
 
diff --git a/README.md b/README.md
index 15a7320..af7045a 100644
--- a/README.md
+++ b/README.md
@@ -3,8 +3,8 @@ qcint (quick libcint)
 
 An optimized libcint branch for X86 platform
 
-version 5.1.8
-2022-01-03
+version 5.2.1
+2023-03-09
 
 
 What is qcint