diff --git a/CMakeLists.txt b/CMakeLists.txt
index 254c01951..c3e941d9f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 # Preamble ####################################################################
 #
 cmake_minimum_required(VERSION 3.20.0)
-project(ImpactX VERSION 24.03)
+project(ImpactX VERSION 24.04)
 
 include(${ImpactX_SOURCE_DIR}/cmake/ImpactXFunctions.cmake)
 
diff --git a/cmake/dependencies/ABLASTR.cmake b/cmake/dependencies/ABLASTR.cmake
index 56a08fc11..88bc404a2 100644
--- a/cmake/dependencies/ABLASTR.cmake
+++ b/cmake/dependencies/ABLASTR.cmake
@@ -144,7 +144,7 @@ macro(find_ablastr)
         set(COMPONENT_DIM 3D)
         set(COMPONENT_PRECISION ${ImpactX_PRECISION} P${ImpactX_PRECISION})
 
-        find_package(ABLASTR 24.03 CONFIG REQUIRED COMPONENTS ${COMPONENT_DIM})
+        find_package(ABLASTR 24.04 CONFIG REQUIRED COMPONENTS ${COMPONENT_DIM})
         message(STATUS "ABLASTR: Found version '${ABLASTR_VERSION}'")
     endif()
 
@@ -178,7 +178,7 @@ 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 "6b0a040d1289f31899c67c2182e4f558a8a8d9ba"
+set(ImpactX_ablastr_branch "24.04"
     CACHE STRING
     "Repository branch for ImpactX_ablastr_repo if(ImpactX_ablastr_internal)")
 
diff --git a/cmake/dependencies/pyAMReX.cmake b/cmake/dependencies/pyAMReX.cmake
index 7cbce2051..a26cd5054 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 24.03 CONFIG REQUIRED)
+        find_package(pyAMReX 24.04 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 "bde190184effaf095f14e173df8f61f31ed67308"
+set(ImpactX_pyamrex_branch "24.04"
     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 e1e04a01d..4fb849dc6 100644
--- a/docs/source/conf.py
+++ b/docs/source/conf.py
@@ -73,9 +73,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = "24.03"
+version = "24.04"
 # The full version, including alpha/beta/rc tags.
-release = "24.03"
+release = "24.04"
 
 # 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 8399da332..1e4f11898 100644
--- a/setup.py
+++ b/setup.py
@@ -235,7 +235,7 @@ def build_extension(self, ext):
 setup(
     name="impactx",
     # note PEP-440 syntax: x.y.zaN but x.y.z.devN
-    version="24.03",
+    version="24.04",
     packages=["impactx"],
     # Python sources:
     package_dir={"": "src/python"},
diff --git a/src/particles/spacecharge/PoissonSolve.cpp b/src/particles/spacecharge/PoissonSolve.cpp
index aedc6affe..65606b4d6 100644
--- a/src/particles/spacecharge/PoissonSolve.cpp
+++ b/src/particles/spacecharge/PoissonSolve.cpp
@@ -88,6 +88,7 @@ namespace impactx::spacecharge
             sorted_phi.emplace_back(&phi[lev]);
         }
 
+        const bool is_solver_multigrid = true;
         const bool do_single_precision_comms = false;
         ablastr::fields::computePhi(
             sorted_rho,
@@ -101,6 +102,7 @@ namespace impactx::spacecharge
             pc.GetParGDB()->DistributionMap(),
             pc.GetParGDB()->boxArray(),
             poisson_boundary_handler,
+            is_solver_multigrid,
             do_single_precision_comms,
             rel_ref_ratio
             /*