diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 08634ff..a915308 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -96,7 +96,7 @@ jobs:
       with:
         repository: 'BLAST-ImpactX/impactx'
         path: 'src'
-        ref: '26.03'
+        ref: '26.04'
 
     - uses: actions/checkout@v4
       with:
diff --git a/library_builders.bat b/library_builders.bat
index e841fb5..6f63dba 100644
--- a/library_builders.bat
+++ b/library_builders.bat
@@ -19,7 +19,7 @@ exit /b 0
 :build_amrex
   if exist amrex-stamp exit /b 0
 
-  set "AMREX_VERSION=26.03"
+  set "AMREX_VERSION=26.04"
 
   curl -sLo "amrex-%AMREX_VERSION%.zip" ^
     "https://github.com/AMReX-Codes/amrex/archive/refs/tags/%AMREX_VERSION%.zip"
diff --git a/library_builders.sh b/library_builders.sh
index 64583a4..8fc7dd2 100644
--- a/library_builders.sh
+++ b/library_builders.sh
@@ -77,7 +77,7 @@ function install_buildessentials {
 function build_amrex {
     if [ -e amrex-stamp ]; then return; fi
 
-    AMREX_VERSION="26.03"
+    AMREX_VERSION="26.04"
 
     curl -sLO https://github.com/AMReX-Codes/amrex/releases/download/${AMREX_VERSION}/amrex-${AMREX_VERSION}.tar.gz
     file amrex*.tar.gz