diff --git a/packages/hxtorch/package.py b/packages/hxtorch/package.py
index 0dec8ac99547a5eb4135b56195d07e707aa41568..bb40db59cd68b910c7f37e6a7ad42b576406c7a6 100644
--- a/packages/hxtorch/package.py
+++ b/packages/hxtorch/package.py
@@ -14,10 +14,10 @@ class Hxtorch(WafPackage):
     # This repo provides a waf binary used for the build below
     git      = "https://github.com/electronicvisions/pynn-brainscales.git"
 
-    version('5.0-rc1', branch='waf')
+    version('6.0-a1', branch='waf')
 
     # PPU compiler dependencies
-    depends_on('oppulance@5.0-rc1')
+    depends_on('oppulance@6.0-a1')
 
     # host software dependencies
     depends_on('bitsery', type=('build', 'link', 'run'))
diff --git a/packages/oppulance/package.py b/packages/oppulance/package.py
index 9374050ba0943218779ceb43e1ad5010c25fb0cb..cc82f3b6028cf9ad4f734f393a3afba84a6b7bbb 100644
--- a/packages/oppulance/package.py
+++ b/packages/oppulance/package.py
@@ -22,8 +22,8 @@ class Oppulance(Package):
 
     releases = [
         {
-            'version': '5.0-rc1',
-            'tag': 'ebrains-5.0-rc1'
+            'version': '6.0-a1',
+            'tag': 'ebrains-6.0-a1'
         },
     ]
 
diff --git a/packages/pynn-brainscales/package.py b/packages/pynn-brainscales/package.py
index 18edd90e2d18c195ce38e0d76494fd777d25739f..65016e7f1cb0e2aa648ffc663c6ca64698279d6b 100644
--- a/packages/pynn-brainscales/package.py
+++ b/packages/pynn-brainscales/package.py
@@ -13,10 +13,10 @@ class PynnBrainscales(WafPackage):
     homepage = "https://github.com/electronicvisions/pynn-brainscales"
     git      = "https://github.com/electronicvisions/pynn-brainscales.git"
 
-    version('5.0-rc1', branch='waf')
+    version('6.0-a1', branch='waf')
 
     # PPU compiler dependencies
-    depends_on('oppulance@5.0-rc1')
+    depends_on('oppulance@6.0-a1')
 
     # host software dependencies
     depends_on('bitsery', type=('build', 'link', 'run'))
diff --git a/spack.yaml b/spack.yaml
index a1ce26b456e5efd66f105ed87b5c07435ddafde4..fdac2634d6eedad8070c8100a006bae0d87535f5 100644
--- a/spack.yaml
+++ b/spack.yaml
@@ -21,7 +21,7 @@ spack:
     - biobb-model@4.0.0
     - biobb-structure-checking@3.12.1
     - biobb-structure-utils@4.0.0
-    - hxtorch@5.0-rc1
+    - hxtorch@6.0-a1
     - nest@3.5_rc1 +sonata
     - neuron@8.2.2 +mpi
     - nglview@3.0.4
@@ -63,7 +63,7 @@ spack:
     - py-tvb-library@2.8.1
     - py-tvb-storage@2.8.1
     - py-viziphant@0.3.0
-    - pynn-brainscales@5.0-rc1
+    - pynn-brainscales@6.0-a1
     - r-rgsl@0.1
     - r-sbtabvfgen@0.1
     - r-uqsa@2.2