diff --git a/spack.yaml b/spack.yaml
index 144189762f00ff6fbecc1e2eea73b6b341a07f4a..6bcbb0e55b3961a9593a088a48df576272a80e18 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -53,7 +53,7 @@ spack:
     - py-tvb-multiscale@2.1.0.ebrains
     - py-tvb-storage@2.8.1
     - py-viziphant@0.4.0
-    - pynn-brainscales@8.0-a1
+    - pynn-brainscales@8.0-a2
     - r-rgsl@0.1.1
     - r-sbtabvfgen@0.1
     - r-uqsa@2.2