diff --git a/environments/mucoll-release-debug/spack.yaml b/environments/mucoll-release-debug/spack.yaml
index 57d8d62..2f53093 100644
--- a/environments/mucoll-release-debug/spack.yaml
+++ b/environments/mucoll-release-debug/spack.yaml
@@ -36,7 +36,7 @@ spack:
     marlintrkprocessors:
       require: '@2.15.1'
     actstracking:
-      require: '@1.2'
+      require: '@1.2.1'
     muoncvxddigitiser:
       require: '@0.2'
 
diff --git a/environments/mucoll-release/spack.yaml b/environments/mucoll-release/spack.yaml
index a1ec04c..8d839d4 100644
--- a/environments/mucoll-release/spack.yaml
+++ b/environments/mucoll-release/spack.yaml
@@ -38,7 +38,7 @@ spack:
     marlintrkprocessors:
       require: '@2.15.1'
     actstracking:
-      require: '@1.2'
+      require: '@1.2.1'
     muoncvxddigitiser:
       require: '@0.2'
 
diff --git a/packages/actstracking/package.py b/packages/actstracking/package.py
index 63d6c7c..99f7851 100644
--- a/packages/actstracking/package.py
+++ b/packages/actstracking/package.py
@@ -16,7 +16,8 @@ class Actstracking(CMakePackage, MCIlcsoftpackage):
     maintainers = ['gianelle', 'kkrizka']
 
     version('main', branch='main')
-    version('1.2', sha256='7390d03ab848f7ad9e67c5aabda8122942a885256775174db30964fb9fe028e1', preferred=True)
+    version('1.2.1', sha256='747c15a4c937ab09d79afcc956bb1f1f82ce345febfb4bd18462b71e70ae0b29', preferred=True)
+    version('1.2', sha256='7390d03ab848f7ad9e67c5aabda8122942a885256775174db30964fb9fe028e1')
     version('1.1.0', sha256='d565e70a2fec97d0d2e81ada69ed54ef8dacc44b0f608b4cf3dffa561091afeb')
     version('1.0.0', sha256='0e98f2185920358d9c220883a48df42f3b5282beb32a91a19f9f3f5c1adc103b')