diff --git a/.github/workflows/mad_modelDiff.yml b/.github/workflows/mad_modelDiff.yml
index a4b9169b44e..3e4111cdfb6 100644
--- a/.github/workflows/mad_modelDiff.yml
+++ b/.github/workflows/mad_modelDiff.yml
@@ -61,7 +61,7 @@ jobs:
             DATABASE=$2
             cd codeql-$QL_VARIANT
             SHORTNAME=`basename $DATABASE`
-            python java/ql/src/utils/model-generator/GenerateFlowModel.py $DATABASE $MODELS/${SHORTNAME}.qll
+            python3 java/ql/src/utils/model-generator/GenerateFlowModel.py $DATABASE $MODELS/${SHORTNAME}.qll
             mv $MODELS/${SHORTNAME}.qll $MODELS/${SHORTNAME}Generated_${QL_VARIANT}.qll
             cd ..
           }