diff --git a/bitnami/drupal/9/debian-10/Dockerfile b/bitnami/drupal/9/debian-10/Dockerfile
index 4e9fffef3582..df837d0cbce8 100644
--- a/bitnami/drupal/9/debian-10/Dockerfile
+++ b/bitnami/drupal/9/debian-10/Dockerfile
@@ -29,7 +29,7 @@ ENV ALLOW_EMPTY_PASSWORD="no" \
     APACHE_HTTPS_PORT_NUMBER="" \
     APACHE_HTTP_PORT_NUMBER="" \
     BITNAMI_APP_NAME="drupal" \
-    BITNAMI_IMAGE_VERSION="9.1.10-debian-10-r3" \
+    BITNAMI_IMAGE_VERSION="9.1.10-debian-10-r4" \
     MARIADB_HOST="mariadb" \
     MARIADB_PORT_NUMBER="3306" \
     MARIADB_ROOT_PASSWORD="" \
diff --git a/bitnami/drupal/9/debian-10/prebuildfs/opt/bitnami/scripts/libpersistence.sh b/bitnami/drupal/9/debian-10/prebuildfs/opt/bitnami/scripts/libpersistence.sh
index 55e1bef8d71d..99df69681c27 100644
--- a/bitnami/drupal/9/debian-10/prebuildfs/opt/bitnami/scripts/libpersistence.sh
+++ b/bitnami/drupal/9/debian-10/prebuildfs/opt/bitnami/scripts/libpersistence.sh
@@ -31,7 +31,7 @@ persist_app() {
     local -r install_dir="${BITNAMI_ROOT_DIR}/${app}"
     local -r persist_dir="${BITNAMI_VOLUME_DIR}/${app}"
     # Persist the individual files
-    if [[ "${#files_to_persist[@]}" -lt 0 ]]; then
+    if [[ "${#files_to_persist[@]}" -le 0 ]]; then
         warn "No files are configured to be persisted"
         return
     fi
@@ -87,7 +87,7 @@ restore_persisted_app() {
     local -r install_dir="${BITNAMI_ROOT_DIR}/${app}"
     local -r persist_dir="${BITNAMI_VOLUME_DIR}/${app}"
     # Restore the individual persisted files
-    if [[ "${#files_to_restore[@]}" -lt 0 ]]; then
+    if [[ "${#files_to_restore[@]}" -le 0 ]]; then
         warn "No persisted files are configured to be restored"
         return
     fi
diff --git a/bitnami/drupal/README.md b/bitnami/drupal/README.md
index 3f140e6c1301..9f242f7d2773 100644
--- a/bitnami/drupal/README.md
+++ b/bitnami/drupal/README.md
@@ -41,7 +41,7 @@ Bitnami containers can be used with [Kubeapps](https://kubeapps.com/) for deploy
 Learn more about the Bitnami tagging policy and the difference between rolling tags and immutable tags [in our documentation page](https://docs.bitnami.com/tutorials/understand-rolling-tags-containers/).
 
 
-* [`9`, `9-debian-10`, `9.1.10`, `9.1.10-debian-10-r3`, `latest` (9/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-drupal/blob/9.1.10-debian-10-r3/9/debian-10/Dockerfile)
+* [`9`, `9-debian-10`, `9.1.10`, `9.1.10-debian-10-r4`, `latest` (9/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-drupal/blob/9.1.10-debian-10-r4/9/debian-10/Dockerfile)
 * [`8`, `8-debian-10`, `8.9.16`, `8.9.16-debian-10-r11` (8/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-drupal/blob/8.9.16-debian-10-r11/8/debian-10/Dockerfile)
 
 Subscribe to project updates by watching the [bitnami/drupal GitHub repo](https://github.com/bitnami/bitnami-docker-drupal).