diff --git a/scripts/_common.sh b/scripts/_common.sh
index 22ef669..f65b555 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -26,4 +26,17 @@ extract_application() {
     || ynh_die "Unable to extract application archive"
   rm "$archive"
   sudo rsync -a "$TMPDIR"/*/* "$DESTDIR"
+}
+
+# Fix path if needed
+# usage: fix_patch PATH_TO_FIX
+fix_path() {
+  local path=$1
+  if [ "${path:0:1}" != "/" ] && [ ${#path} -gt 0 ]; then
+         path="/$path"
+  fi
+  if [ "${path:${#path}-1}" == "/" ] && [ ${#path} -gt 1 ]; then
+         path="${path:0:${#path}-1}"
+  fi
+  echo "$path"
 }
\ No newline at end of file
diff --git a/scripts/install b/scripts/install
index 62ecfeb..1ea2e4c 100644
--- a/scripts/install
+++ b/scripts/install
@@ -32,12 +32,7 @@ ynh_app_setting_set "$app" is_public "$is_public"
 ynh_app_setting_set "$app" language "$language"
 
 # Fix path if needed
-if [ "${path:0:1}" != "/" ] && [ ${#path} -gt 0 ]; then
-       path="/$path"
-fi
-if [ "${path:${#path}-1}" == "/" ] && [ ${#path} -gt 1 ]; then
-       path="${path:0:${#path}-1}"
-fi
+path=$(fix_path $path)
 
 # Check domain/path availability
 sudo yunohost app checkurl "${domain}${path}" -a "$app" \
diff --git a/scripts/upgrade b/scripts/upgrade
index a54af26..e48e8a2 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -20,6 +20,9 @@ admin=$(ynh_app_setting_get "$app" admin)
 is_public=$(ynh_app_setting_get "$app" is_public)
 language=$(ynh_app_setting_get "$app" language)
 
+# Fix path if needed
+path=$(fix_path $path)
+
 # Download and extract application 
 extract_application ..
 
@@ -39,7 +42,7 @@ sudo chmod 755 -R $src_path/galleries
 
 # Modify Nginx configuration file and copy it to Nginx conf directory
 nginx_conf=../conf/nginx.conf
-sed -i "s@YNH_WWW_PATH@${path%/}@g" $nginx_conf
+sed -i "s@YNH_WWW_PATH@${path}@g" $nginx_conf
 sed -i "s@YNH_WWW_ALIAS@$src_path/@g" $nginx_conf
 sudo cp $nginx_conf /etc/nginx/conf.d/$domain.d/$app.conf