diff --git a/eic-spack.sh b/eic-spack.sh
index eac402dc..38f444ca 100644
--- a/eic-spack.sh
+++ b/eic-spack.sh
@@ -5,4 +5,4 @@ EICSPACK_ORGREPO="eic/eic-spack"
 
 ## EIC spack commit hash or github version, e.g. v0.19.7
 ## note: nightly builds could use a branch e.g. releases/v0.19
-EICSPACK_VERSION="ce2dc68e4f75299f7a684708788870282ecde53a"
+EICSPACK_VERSION="f56f48eeb7c4b2c286962ab4d7048d821bc35c6f"
diff --git a/spack-environment/packages.yaml b/spack-environment/packages.yaml
index 1c28c8c2..e122afab 100644
--- a/spack-environment/packages.yaml
+++ b/spack-environment/packages.yaml
@@ -35,7 +35,7 @@ packages:
     - cxxstd=17
   acts:
     require:
-    - '@45.1.1'
+    - '@45.3.0'
     - cxxstd=20 +dd4hep +edm4hep +examples +fatras +geant4 +json +onnx +podio +python +svg +root +pr4496 +pr4502 +pr4620
     # ACTS requires same compiler as DD4hep since compiler options are reused
     - spec: '%gcc'