diff --git a/environment.yml b/environment.yml
index e0a254c..31c4784 100644
--- a/environment.yml
+++ b/environment.yml
@@ -57,13 +57,13 @@ dependencies:
   - hypothesis==6.58.0 # needed by numpy testing tools
   - networkx==2.8.8
   - numba==0.58.1 # high-performance numerics
-  - numpy~=1.26.0
-  - pandas==1.5.1
-  - scikit-image==0.22.0
-  - scikit-learn==1.4.0
+  - numpy==1.23.5
+  - pandas~=1.5.1
+  - scikit-image==0.19.3
+  - scikit-learn==1.1.3
   - scipy==1.9.3
   - statsmodels==0.13.5
-  - sympy~=1.12.0
+  - sympy~=1.11.0
   - xarray>=2023.05.0
 
   # Visualization packages
@@ -137,7 +137,7 @@ dependencies:
   # Maybe needed for qgis? https://github.com/conda-forge/qgis-feedstock/issues/263
   - pyopencl
   # Resolves warning "No ICDs were found": https://github.com/CryoInTheCloud/hub-image/issues/50
-  # - ocl-icd-system
+#  - ocl-icd-system
   # needed for Linux desktop to work
   - websockify>=0.10
   # Includes new subcommands (`switch` & `restore`) and vulnerability fixes