diff --git a/requirements_general_dev.txt b/requirements_general_dev.txt
index e2a73214..665aeda0 100644
--- a/requirements_general_dev.txt
+++ b/requirements_general_dev.txt
@@ -12,8 +12,8 @@ Sphinx==5.1.1
 sphinx-rtd-theme==1.1.0
 sphinx-toolbox==3.4.0
 sphinx-argparse==0.4.0
-xarray
-pypdf
+xarray==2023.1.*
+pypdf==5.1.*
 
 # for SA - maybe merits its own file??
 scikit-learn