diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2f390dea5..fb7ccd6a7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Preamble ####################################################################
 #
 cmake_minimum_required(VERSION 3.20.0)
-project(ImpactX VERSION 23.08)
+project(ImpactX VERSION 23.09)
 
 include(${ImpactX_SOURCE_DIR}/cmake/ImpactXFunctions.cmake)
 
diff --git a/cmake/dependencies/ABLASTR.cmake b/cmake/dependencies/ABLASTR.cmake
index 0b783b27f..2db4d7a8b 100644
--- a/cmake/dependencies/ABLASTR.cmake
+++ b/cmake/dependencies/ABLASTR.cmake
@@ -138,7 +138,7 @@ macro(find_ablastr)
         set(COMPONENT_DIM 3D)
         set(COMPONENT_PRECISION ${ImpactX_PRECISION} P${ImpactX_PRECISION})
 
-        find_package(ABLASTR 23.08 CONFIG REQUIRED COMPONENTS ${COMPONENT_DIM})
+        find_package(ABLASTR 23.09 CONFIG REQUIRED COMPONENTS ${COMPONENT_DIM})
         message(STATUS "ABLASTR: Found version '${ABLASTR_VERSION}'")
     endif()
 
@@ -169,7 +169,7 @@ set(ImpactX_openpmd_src ""
 set(ImpactX_ablastr_repo "https://github.com/ECP-WarpX/WarpX.git"
     CACHE STRING
     "Repository URI to pull and build ABLASTR from if(ImpactX_ablastr_internal)")
-set(ImpactX_ablastr_branch "23.08"
+set(ImpactX_ablastr_branch "23.09"
     CACHE STRING
     "Repository branch for ImpactX_ablastr_repo if(ImpactX_ablastr_internal)")
 
@@ -177,7 +177,7 @@ set(ImpactX_ablastr_branch "23.08"
 set(ImpactX_amrex_repo "https://github.com/AMReX-Codes/amrex.git"
     CACHE STRING
     "Repository URI to pull and build AMReX from if(ImpactX_amrex_internal)")
-set(ImpactX_amrex_branch "23.08"
+set(ImpactX_amrex_branch "23.09"
     CACHE STRING
     "Repository branch for ImpactX_amrex_repo if(ImpactX_amrex_internal)")
 
diff --git a/cmake/dependencies/pyAMReX.cmake b/cmake/dependencies/pyAMReX.cmake
index 68e030c99..7cb5d65f3 100644
--- a/cmake/dependencies/pyAMReX.cmake
+++ b/cmake/dependencies/pyAMReX.cmake
@@ -64,7 +64,7 @@ function(find_pyamrex)
         endif()
     elseif(NOT ImpactX_pyamrex_internal)
         # TODO: MPI control
-        find_package(pyAMReX 23.08 CONFIG REQUIRED)
+        find_package(pyAMReX 23.09 CONFIG REQUIRED)
         message(STATUS "pyAMReX: Found version '${pyamrex_VERSION}'")
     endif()
 endfunction()
@@ -79,7 +79,7 @@ option(ImpactX_pyamrex_internal "Download & build pyAMReX" ON)
 set(ImpactX_pyamrex_repo "https://github.com/AMReX-Codes/pyamrex.git"
     CACHE STRING
     "Repository URI to pull and build pyamrex from if(ImpactX_pyamrex_internal)")
-set(ImpactX_pyamrex_branch "23.08"
+set(ImpactX_pyamrex_branch "23.09"
     CACHE STRING
     "Repository branch for ImpactX_pyamrex_repo if(ImpactX_pyamrex_internal)")
 
diff --git a/docs/source/conf.py b/docs/source/conf.py
index edb6edd8e..835a69592 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -72,9 +72,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = "23.08"
+version = "23.09"
 # The full version, including alpha/beta/rc tags.
-release = "23.08"
+release = "23.09"
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/setup.py b/setup.py
index a56241a5e..361ce3418 100644
--- a/setup.py
+++ b/setup.py
@@ -239,7 +239,7 @@ def build_extension(self, ext):
 setup(
     name="impactx",
     # note PEP-440 syntax: x.y.zaN but x.y.z.devN
-    version="23.08",
+    version="23.09",
     packages=["impactx"],
     # Python sources:
     package_dir={"": "src/python"},