diff --git a/comanage-registry-base/Dockerfile b/comanage-registry-base/Dockerfile
index 5bc4a1c..e43f0fb 100644
--- a/comanage-registry-base/Dockerfile
+++ b/comanage-registry-base/Dockerfile
@@ -23,7 +23,9 @@ FROM php:7.3.33-apache-bullseye
 # --with-mbstring
 # but xls, pdo, pdo_mysql, pdo_pgsql, mysqli, pgsql, 
 # and ldap extensions must be built.
-RUN apt-get update && apt-get install -y \
+RUN apt-get update \
+      && apt-get upgrade -y \
+      && apt-get install -y \
          libldap-2.4-2 \
          libldap2-dev \
          libmariadb-dev \