diff --git a/cmake/dependencies/ABLASTR.cmake b/cmake/dependencies/ABLASTR.cmake
index 0c931fe3d..03b416a40 100644
--- a/cmake/dependencies/ABLASTR.cmake
+++ b/cmake/dependencies/ABLASTR.cmake
@@ -186,7 +186,7 @@ set(ImpactX_ablastr_branch "23.11"
 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 ""
+set(ImpactX_amrex_branch "175b99d913dc2748e43c53192737170c770fe0e8"
     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 3964fc373..1a51f3c3c 100644
--- a/cmake/dependencies/pyAMReX.cmake
+++ b/cmake/dependencies/pyAMReX.cmake
@@ -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 "23.11"
+set(ImpactX_pyamrex_branch "d90e390971de4144fb380ae62d5c74cdc27dd3fc"
     CACHE STRING
     "Repository branch for ImpactX_pyamrex_repo if(ImpactX_pyamrex_internal)")