diff --git a/VERSION b/VERSION
index 197c4d5c2d7c724b4cd0048f4e3574bb3fa5c8db..8e8299dcc068356889b365e23c948b92c6dfcd78 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.4.0
+2.4.2
diff --git a/containers/builder/spack.yaml b/containers/builder/spack.yaml
index 0ed51310f6a429e9cc470c64d9ef0743205e5d32..80d99fdd42f27ad1e381a9e3d2b4228a5aa282be 100644
--- a/containers/builder/spack.yaml
+++ b/containers/builder/spack.yaml
@@ -23,7 +23,7 @@ spack:
     - podio@master
     - geant4@10.6.2 cxxstd=17 +opengl +vecgeom +x11 +qt ^qt +opengl
     - dd4hep@1.14.1 +geant4 +assimp +hepmc3 +ipo
-    - acts@2.00.0 +dd4hep +digitization +identification +json +tgeo +ipo
+    - acts@3.00.0 +dd4hep +digitization +identification +json +tgeo +ipo
     - gaudi@35.0
     - dawn@3_91a
     - dawncut@1_54a