diff --git a/CMakeLists.txt b/CMakeLists.txt
index aea5298801bba50eae5f7c4b4c4856ad45cdea20..e7d729192dec522e627cd4263c6d639ccecf7fd6 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,7 +12,7 @@ cmake_policy(SET CMP0060 NEW)
 
 set (QMEAN_VERSION_MAJOR 4)
 set (QMEAN_VERSION_MINOR 3)
-set (QMEAN_VERSION_PATCH 0)
+set (QMEAN_VERSION_PATCH 1)
 set (QMEAN_VERSION_STRING ${QMEAN_VERSION_MAJOR}.${QMEAN_VERSION_MINOR}.${QMEAN_VERSION_PATCH} )
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_SOURCE_DIR}/cmake_support)
@@ -74,7 +74,7 @@ set(PYTHON_MODULE_PATH "python${Python_VERSION_MAJOR}.${Python_VERSION_MINOR}/si
 
 setup_boost()
 
-find_package(OPENSTRUCTURE 2.3.0 REQUIRED
+find_package(OPENSTRUCTURE 2.4.0 REQUIRED
              COMPONENTS mol seq seq_alg mol_alg conop db)
 
 include_directories(${Boost_INCLUDE_DIRS}
diff --git a/doc/source/conf.py b/doc/source/conf.py
index e6d7ab5a0f4858f2cc499241f160c81c5a353895..7bc511e81aaf7d9dca61c4091a3fb6832d86d9c9 100644
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -70,9 +70,9 @@ copyright = u'2016-2020, Gabriel Studer'
 # built documents.
 #
 # The short X.Y version.
-release = '4.3.0'
+release = '4.3.1'
 # The full version, including alpha/beta/rc tags.
-release = '4.3.0'
+release = '4.3.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.