diff --git a/scripts/install b/scripts/install
index 71428ad..d1f349e 100755
--- a/scripts/install
+++ b/scripts/install
@@ -37,7 +37,9 @@ ynh_add_config --template="../sources/patches/main-constants.py.patch.src" --des
 ynh_setup_source --dest_dir="$install_dir"
 
 # Remove the patch for web.py in case visitor are allowed
-patch -u /$install_dir/cps/web.py -i ../conf/web.py.revert.patch
+if [ $(ynh_permission_has_user --permission=main --user=visitors) ]; then
+	patch -u /$install_dir/cps/web.py -i ../conf/web.py.revert.patch
+fi
 
 #install kepubify converter
 ynh_script_progression --message="Installing kepubify..." --weight=1
diff --git a/scripts/upgrade b/scripts/upgrade
index 13a6aa6..eb88a01 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -96,6 +96,12 @@ then
 	# Download, check integrity, uncompress and patch the source from app.src
 	ynh_setup_source --dest_dir="$install_dir"
 	chown -R $app: $install_dir
+	
+	# Remove the patch for web.py in case visitor are allowed
+	if [ $(ynh_permission_has_user --permission=main --user=visitors) ]; then
+		patch -u /$install_dir/cps/web.py -i ../conf/web.py.revert.patch
+	fi
+	
 fi
 
 #=================================================