diff --git a/environment.yml b/environment.yml
index 193845c9b7938676dfa76be8e39d3e915b2f871c..d40d42e358a78d11b2760880e4ea8006d472394d 100644
--- a/environment.yml
+++ b/environment.yml
@@ -25,8 +25,8 @@ dependencies:
     - PyNAFF==1.1.5
     - Cython==3.0.5
   #  - PyHEADTAIL==1.16.4
-  #  - cpymad ==1.14.2
-  #  - pysixtrack ==0.0.6
+    - cpymad ==1.14.2
+    - pysixtrack ==0.0.6
   #  - botorch==0.8.1
   #  - cheetah-accelerator==0.5.18
   #  - --extra-index-url https://download.pytorch.org/whl/cpu