diff --git a/bitnami/postgresql-repmgr/12/debian-11/Dockerfile b/bitnami/postgresql-repmgr/12/debian-11/Dockerfile
index c905100936c7..c388439711ed 100644
--- a/bitnami/postgresql-repmgr/12/debian-11/Dockerfile
+++ b/bitnami/postgresql-repmgr/12/debian-11/Dockerfile
@@ -4,7 +4,7 @@ ARG TARGETARCH
 
 LABEL org.opencontainers.image.authors="https://bitnami.com/contact" \
       org.opencontainers.image.description="Application packaged by Bitnami" \
-      org.opencontainers.image.ref.name="12.13.0-debian-11-r20" \
+      org.opencontainers.image.ref.name="12.13.0-debian-11-r21" \
       org.opencontainers.image.source="https://github.com/bitnami/containers/tree/main/bitnami/postgresql-repmgr" \
       org.opencontainers.image.title="postgresql-repmgr" \
       org.opencontainers.image.vendor="VMware, Inc." \
diff --git a/bitnami/postgresql-repmgr/12/debian-11/prebuildfs/opt/bitnami/scripts/libversion.sh b/bitnami/postgresql-repmgr/12/debian-11/prebuildfs/opt/bitnami/scripts/libversion.sh
index f3bc7568bfa5..ad2f0eee48df 100644
--- a/bitnami/postgresql-repmgr/12/debian-11/prebuildfs/opt/bitnami/scripts/libversion.sh
+++ b/bitnami/postgresql-repmgr/12/debian-11/prebuildfs/opt/bitnami/scripts/libversion.sh
@@ -31,7 +31,7 @@ get_sematic_version () {
 
         while [[ $i -lt $n ]]; do
             if [[ -n "${BASH_REMATCH[$i]}" ]] && [[ "${BASH_REMATCH[$i]:0:1}" != '.' ]];  then
-                version_sections[$j]=${BASH_REMATCH[$i]}
+                version_sections[j]="${BASH_REMATCH[$i]}"
                 ((j++))
             fi
             ((i++))
diff --git a/bitnami/postgresql-repmgr/12/debian-11/rootfs/events/execs/includes/lock_standby.sh b/bitnami/postgresql-repmgr/12/debian-11/rootfs/events/execs/includes/lock_standby.sh
index 641c19883b91..5d9fe6c897fc 100755
--- a/bitnami/postgresql-repmgr/12/debian-11/rootfs/events/execs/includes/lock_standby.sh
+++ b/bitnami/postgresql-repmgr/12/debian-11/rootfs/events/execs/includes/lock_standby.sh
@@ -5,8 +5,8 @@ set -o nounset
 set -o pipefail
 # set -o xtrace # Uncomment this line for debugging purposes
 
-readonly query="SELECT upstream_node_id FROM repmgr.nodes WHERE node_id=$(repmgr_get_node_id)"
-readonly new_upstream_node_id="$(echo "$query" | BITNAMI_DEBUG=true postgresql_execute "$REPMGR_DATABASE" "$POSTGRESQL_REPLICATION_USER" "$POSTGRESQL_REPLICATION_PASSWORD" "" "" "-tA")"
+query="SELECT upstream_node_id FROM repmgr.nodes WHERE node_id=$(repmgr_get_node_id)"
+new_upstream_node_id="$(echo "$query" | BITNAMI_DEBUG=true postgresql_execute "$REPMGR_DATABASE" "$POSTGRESQL_REPLICATION_USER" "$POSTGRESQL_REPLICATION_PASSWORD" "" "" "-tA")"
 if [[ -n "$new_upstream_node_id" ]]; then
     # shellcheck disable=SC2154
     echo "$header Locking standby (new_upstream_node_id=$new_upstream_node_id)..."
diff --git a/bitnami/postgresql-repmgr/12/debian-11/rootfs/opt/bitnami/scripts/libpostgresql.sh b/bitnami/postgresql-repmgr/12/debian-11/rootfs/opt/bitnami/scripts/libpostgresql.sh
index 7285579c890a..347d506b6e42 100644
--- a/bitnami/postgresql-repmgr/12/debian-11/rootfs/opt/bitnami/scripts/libpostgresql.sh
+++ b/bitnami/postgresql-repmgr/12/debian-11/rootfs/opt/bitnami/scripts/libpostgresql.sh
@@ -997,6 +997,8 @@ postgresql_remove_pghba_lines() {
     done
 }
 
+# shellcheck disable=SC2148
+
 ########################
 # Return PostgreSQL major version
 # Globals:
diff --git a/bitnami/postgresql-repmgr/12/debian-11/rootfs/opt/bitnami/scripts/postgresql-repmgr/run.sh b/bitnami/postgresql-repmgr/12/debian-11/rootfs/opt/bitnami/scripts/postgresql-repmgr/run.sh
index a95170502085..9afe338e4745 100755
--- a/bitnami/postgresql-repmgr/12/debian-11/rootfs/opt/bitnami/scripts/postgresql-repmgr/run.sh
+++ b/bitnami/postgresql-repmgr/12/debian-11/rootfs/opt/bitnami/scripts/postgresql-repmgr/run.sh
@@ -16,6 +16,7 @@ set -o pipefail
 . /opt/bitnami/scripts/postgresql-env.sh
 
 readonly repmgr_flags=("-f" "$REPMGR_CONF_FILE" "--daemonize=false")
+# shellcheck disable=SC2155
 readonly repmgr_cmd=$(command -v repmgrd)
 
 postgresql_start_bg true