diff --git a/bitnami/postgresql-repmgr/13/debian-10/Dockerfile b/bitnami/postgresql-repmgr/13/debian-10/Dockerfile
index 5d401840b384..79f4ae6046d0 100644
--- a/bitnami/postgresql-repmgr/13/debian-10/Dockerfile
+++ b/bitnami/postgresql-repmgr/13/debian-10/Dockerfile
@@ -22,7 +22,7 @@ COPY rootfs /
 RUN /opt/bitnami/scripts/postgresql-repmgr/postunpack.sh
 RUN /opt/bitnami/scripts/locales/add-extra-locales.sh
 ENV BITNAMI_APP_NAME="postgresql-repmgr" \
-    BITNAMI_IMAGE_VERSION="13.4.0-debian-10-r88" \
+    BITNAMI_IMAGE_VERSION="13.4.0-debian-10-r89" \
     LANG="en_US.UTF-8" \
     LANGUAGE="en_US:en" \
     NSS_WRAPPER_LIB="/opt/bitnami/common/lib/libnss_wrapper.so" \
diff --git a/bitnami/postgresql-repmgr/13/debian-10/rootfs/opt/bitnami/scripts/librepmgr.sh b/bitnami/postgresql-repmgr/13/debian-10/rootfs/opt/bitnami/scripts/librepmgr.sh
index 8d8219a4353f..ef7d50169c7c 100644
--- a/bitnami/postgresql-repmgr/13/debian-10/rootfs/opt/bitnami/scripts/librepmgr.sh
+++ b/bitnami/postgresql-repmgr/13/debian-10/rootfs/opt/bitnami/scripts/librepmgr.sh
@@ -400,6 +400,24 @@ local    all              all                    trust
 EOF
 }
 
+########################
+# Check if a given configuration file was mounted externally
+# Globals:
+#   REPMGR_MOUNTED_CONF_DIR
+# Arguments:
+#   $1 - Filename
+# Returns:
+#   1 if the file was mounted externally, 0 otherwise
+#########################
+repmgr_is_file_external() {
+    local -r filename=$1
+    if [[ -d "$REPMGR_MOUNTED_CONF_DIR" ]] && [[ -f "$REPMGR_MOUNTED_CONF_DIR"/"$filename" ]]; then
+        return 0
+    else
+        return 1
+    fi
+}
+
 ########################
 # Prepare PostgreSQL default configuration
 # Globals:
@@ -418,12 +436,12 @@ repmgr_postgresql_configuration() {
         debug "User injected custom configuration detected!"
     fi
     ensure_dir_exists "$POSTGRESQL_MOUNTED_CONF_DIR"
-    if [[ -f "${REPMGR_MOUNTED_CONF_DIR}/postgresql.conf" ]]; then
+    if repmgr_is_file_external "postgresql.conf"; then
         cp "${REPMGR_MOUNTED_CONF_DIR}/postgresql.conf" "${POSTGRESQL_MOUNTED_CONF_DIR}/postgresql.conf"
     else
         repmgr_inject_postgresql_configuration
     fi
-    if [[ -f "${REPMGR_MOUNTED_CONF_DIR}/pg_hba.conf" ]]; then
+    if repmgr_is_file_external "pg_hba.conf"; then
         cp "${REPMGR_MOUNTED_CONF_DIR}/pg_hba.conf" "${POSTGRESQL_MOUNTED_CONF_DIR}/pg_hba.conf"
     else
         repmgr_inject_pghba_configuration
@@ -683,7 +701,7 @@ repmgr_initialize() {
       fi
     fi
     postgresql_initialize
-    if ! postgresql_is_file_external "postgresql.conf"; then
+    if ! repmgr_is_file_external "postgresql.conf"; then
         # Allow remote connections, required to register primary and standby nodes
         postgresql_enable_remote_connections
         # Configure port and restrict access to PostgreSQL (MD5)
@@ -692,7 +710,7 @@ repmgr_initialize() {
         postgresql_configure_replication_parameters
         postgresql_configure_fsync
     fi
-    if ! postgresql_is_file_external "pg_hba.conf"; then
+    if ! repmgr_is_file_external "pg_hba.conf"; then
         is_boolean_yes "$REPMGR_PGHBA_TRUST_ALL" ||  postgresql_restrict_pghba
     fi
     if [[ "$REPMGR_ROLE" = "primary" ]]; then
diff --git a/bitnami/postgresql-repmgr/README.md b/bitnami/postgresql-repmgr/README.md
index 3accd1a54f74..51e72a262084 100644
--- a/bitnami/postgresql-repmgr/README.md
+++ b/bitnami/postgresql-repmgr/README.md
@@ -48,7 +48,7 @@ Learn more about the Bitnami tagging policy and the difference between rolling t
 
 
 * [`14`, `14-debian-10`, `14.0.0`, `14.0.0-debian-10-r20` (14/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-postgresql-repmgr/blob/14.0.0-debian-10-r20/14/debian-10/Dockerfile)
-* [`13`, `13-debian-10`, `13.4.0`, `13.4.0-debian-10-r88` (13/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-postgresql-repmgr/blob/13.4.0-debian-10-r88/13/debian-10/Dockerfile)
+* [`13`, `13-debian-10`, `13.4.0`, `13.4.0-debian-10-r89` (13/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-postgresql-repmgr/blob/13.4.0-debian-10-r89/13/debian-10/Dockerfile)
 * [`12`, `12-debian-10`, `12.8.0`, `12.8.0-debian-10-r93` (12/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-postgresql-repmgr/blob/12.8.0-debian-10-r93/12/debian-10/Dockerfile)
 * [`11`, `11-debian-10`, `11.13.0`, `11.13.0-debian-10-r58`, `latest` (11/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-postgresql-repmgr/blob/11.13.0-debian-10-r58/11/debian-10/Dockerfile)
 * [`10`, `10-debian-10`, `10.18.0`, `10.18.0-debian-10-r89` (10/debian-10/Dockerfile)](https://github.com/bitnami/bitnami-docker-postgresql-repmgr/blob/10.18.0-debian-10-r89/10/debian-10/Dockerfile)