diff --git a/environment.yml b/environment.yml
index e624a3c09de2c6fc229a0b0aee5edb0dbdd607ed..a6f06415f96e335c54d4cf5d0b4da52f8a04a55c 100644
--- a/environment.yml
+++ b/environment.yml
@@ -6,22 +6,22 @@ dependencies:
     - libblas=*=*mkl"
     - numpy
     - scipy
-    - pyiron
-    - pyiron_base
+    - pyiron=0.4.6
+    - pyiron_base=0.5.12
     - pyiron_gpl
-    - pyiron_atomistics >=0.2.0
+    - pyiron_atomistics=0.2.47
     - pyiron-data >=0.0.5
-    - lammps
+    - lammps=2021.10.27
     - iprpy-data
-    - gpaw
+    #- gpaw
     - sphinxdft >=2.7.0
     - sphinxdft-data
     - nglview
     - seaborn
-    - pyscal
+    - pyscal=2.10.15
     - sqsgenerator
     - pymatgen
-    - calphy
+    - calphy=1.0.3
     - make
     - cmake
     - gcc_impl_linux-64=12.1.0