diff --git a/downloads-generation/models_class1_pan_unselected/GENERATE.sh b/downloads-generation/models_class1_pan_unselected/GENERATE.sh
index d816020a00d0c2d43e18e3f0c18cf33de77c8f11..1d3cef92399c845ea57e542ac4e88049131691ed 100755
--- a/downloads-generation/models_class1_pan_unselected/GENERATE.sh
+++ b/downloads-generation/models_class1_pan_unselected/GENERATE.sh
@@ -34,6 +34,8 @@ echo "Detected GPUS: $GPUS"
 PROCESSORS=$(getconf _NPROCESSORS_ONLN)
 echo "Detected processors: $PROCESSORS"
 
+export PYTHONUNBUFFERED=1
+
 for kind in with_mass_spec no_mass_spec
 do
     mhcflurry-class1-train-pan-allele-models \