diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1a90c2db8aa7c46b288535172aca89334765f8af..c4331fcb4f9f3cc4e31eeeed87d8c1133632df72 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -24,8 +24,8 @@ include(PROMOD3)
 
 # versioning info
 set(PROMOD3_VERSION_MAJOR 3)
-set(PROMOD3_VERSION_MINOR 3)
-set(PROMOD3_VERSION_PATCH 1)
+set(PROMOD3_VERSION_MINOR 4)
+set(PROMOD3_VERSION_PATCH 0)
 set(PROMOD3_VERSION_STRING ${PROMOD3_VERSION_MAJOR}.${PROMOD3_VERSION_MINOR})
 set(PROMOD3_VERSION_STRING ${PROMOD3_VERSION_STRING}.${PROMOD3_VERSION_PATCH})
 
diff --git a/container/Dockerfile b/container/Dockerfile
index bab75e94add97ed6b33f6bc0441f7bb996edd59a..e50c7956cd7f63dc590a7581eb97055e06b403fb 100644
--- a/container/Dockerfile
+++ b/container/Dockerfile
@@ -1,9 +1,9 @@
-ARG OPENSTRUCTURE_IMAGE_TAG="2.5.0-jammy"
+ARG OPENSTRUCTURE_IMAGE_TAG="2.6.0-jammy"
 FROM registry.scicore.unibas.ch/schwede/openstructure:${OPENSTRUCTURE_IMAGE_TAG}
 
 # ARGUMENTS
 ###########
-ARG PROMOD_VERSION="3.3.1"
+ARG PROMOD_VERSION="3.4.0"
 ARG SRC_FOLDER="/usr/local/src"
 
 
diff --git a/container/Singularity b/container/Singularity
index b7cdd9c18899372ab521e848d9d39ffc3f80b3cb..21a1b71afbd39dd34c782e1df68e01d00378acf5 100644
--- a/container/Singularity
+++ b/container/Singularity
@@ -1,5 +1,5 @@
 BootStrap: docker
-From: registry.scicore.unibas.ch/schwede/promod3:3.3.1-OST2.5.0-jammy
+From: registry.scicore.unibas.ch/schwede/promod3:3.4.0-OST2.6.0-jammy
 %post
 ##############################################################################
 # POST
diff --git a/doc/conf.py.in b/doc/conf.py.in
index c132f0eb3b03ddbb875e37b840497cacd498e417..d81787575eca8e01e159a5c8dc8cf5e4b3ce82e3 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:: 2.5.0
+.. |ost_version| replace:: 2.6.0
 .. |python| replace:: Python
 .. |sphinx| replace:: Sphinx
 .. _sphinx: http://sphinx-doc.org/