diff --git a/spack.yaml b/spack.yaml
index 7bacbeaf6edbd39381d545a2e465c1a85be571d4..a24c75927711b0c26a0115724fa33d65c4eb8179 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -1,6 +1,6 @@
 spack:
   specs:
-    - acts@14.1.0 +dd4hep +digitization +identification +json +tgeo +ipo +examples +fatras +geant4
+    - acts@15.1.0 +dd4hep +digitization +identification +json +tgeo +ipo +examples +fatras +geant4
     - cairo@1.16.0 +fc+ft+X+pdf+gobject
     - clhep@2.4.4.0 cxxstd=17
     - cmake@3.21.4