diff --git a/scripts/_common.sh b/scripts/_common.sh
index 48d9cfa..06dd4f7 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -28,6 +28,11 @@ setup_dir() {
 install_source() {
     if [ -n "$(uname -m | grep arm)" ]
     then
+        # Clean old file, sometime it could make some big issues if we don't do this !!
+        ynh_secure_remove --file=$final_path/bin
+        ynh_secure_remove --file=$final_path/lib
+        ynh_secure_remove --file=$final_path/include
+        ynh_secure_remove --file=$final_path/share
         ynh_setup_source --dest_dir $final_path/ --source_id "armv7_stretch"
     else
 # 		Install virtualenv if it don't exist
@@ -38,6 +43,7 @@ install_source() {
         cp ../conf/virtualenv_activate $final_path/bin/activate
         source $final_path/bin/activate
         pip3 install --upgrade pip
+        pip3 install --upgrade 'Werkzeug<1.0'
         pip3 install --upgrade https://ftp.postgresql.org/pub/pgadmin/pgadmin$app_main_version/v$app_sub_version/pip/pgadmin${APP_VERSION}-py2.py3-none-any.whl
         deactivate
     fi