diff --git a/CMakeLists.txt b/CMakeLists.txt
index b46db6e8ed63e9a7a6750d43f1905e8c66bd19df..c350a53b11f1e83862a563b3f5a9d6c301d588ca 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -103,7 +103,7 @@ if(NOT DISABLE_DOCUMENTATION)
   # this URL should always point to the latest version of OST
   set(OST_DOC_URL "https://www.openstructure.org/docs")
 endif()
-find_package(OPENSTRUCTURE 2.2.0 REQUIRED
+find_package(OPENSTRUCTURE 2.3.0 REQUIRED
              COMPONENTS io mol seq seq_alg mol_alg conop img mol_mm)
 
 if(CMAKE_COMPILER_IS_GNUCXX)
diff --git a/doc/conf.py.in b/doc/conf.py.in
index 8b20ef156d2fc86cdf3cdfba45a72317f781f502..d00634a2a04492443ec1044a9803a8892225649a 100644
--- a/doc/conf.py.in
+++ b/doc/conf.py.in
@@ -286,7 +286,7 @@ rst_epilog = """
 .. |cmake| replace:: CMake
 .. |ost_l| replace:: OpenStructure
 .. |ost_s| replace:: OST
-.. |ost_version| replace:: 2.2.0
+.. |ost_version| replace:: 2.3.0
 .. |python| replace:: Python
 .. |sphinx| replace:: Sphinx
 .. _sphinx: http://sphinx-doc.org/