diff --git a/scripts/start.sh b/scripts/start.sh
index 398a855ced..a963ddc7a3 100755
--- a/scripts/start.sh
+++ b/scripts/start.sh
@@ -12,30 +12,30 @@ min() {
 workers=$(min 30 ${ANTARES_NB_WORKERS:-$((2*$(nproc) + 1))}) # default (2*nproc + 1) and max is 30
 
 # Check for --no-gunicorn or --multiple-ports argument
-use_gunicorn=true
+use_uvicorn=false
 for arg in "$@"
 do
     if [[ $arg == "--no-gunicorn" || $arg == "--multiple-ports" ]]; then
-        use_gunicorn=false
+        use_uvicorn=true
         break
     fi
 done
 
 if [ -z "$1" ] ; then
   sh $CUR_DIR/pre-start.sh
-  if [ "$use_gunicorn" = true ]; then
-    gunicorn --config $BASE_DIR/conf/gunicorn.py --worker-class=uvicorn.workers.UvicornWorker antarest.wsgi:app
-  else
-    pids=() # Initialize empty array to store background process IDs
-    for ((i=0; i<workers; i++))
-    do
-      uvicorn antarest.wsgi:app --host 0.0.0.0 --port $((5000 + $i)) --log-level info --timeout-keep-alive 600 &
-      pids+=($!) # Store background process IDs
-    done
-    for pid in ${pids[*]};
-    do
-      wait $pid # Wait for each background process to finish
-    done
+  gunicorn --config $BASE_DIR/conf/gunicorn.py --worker-class=uvicorn.workers.UvicornWorker antarest.wsgi:app
+elif [ "$use_uvicorn" = true ]; then
+  sh $CUR_DIR/pre-start.sh
+  pids=() # Initialize empty array to store background process IDs
+  for ((i=0; i<workers; i++))
+  do
+    uvicorn antarest.wsgi:app --host 0.0.0.0 --port $((5000 + $i)) --log-level info --timeout-keep-alive 600 &
+    pids+=($!) # Store background process IDs
+  done
+  for pid in ${pids[*]};
+  do
+    wait $pid # Wait for each background process to finish
+  done
 else
   export PYTHONPATH=$BASE_DIR
   python3 $BASE_DIR/antarest/main.py -c $ANTAREST_CONF --module "$1"