diff --git a/build-tools/build-docker-images/stx-centos/Dockerfile.dev b/build-tools/build-docker-images/stx-centos/Dockerfile.dev
index 8d586abf..af30a6b6 100644
--- a/build-tools/build-docker-images/stx-centos/Dockerfile.dev
+++ b/build-tools/build-docker-images/stx-centos/Dockerfile.dev
@@ -12,3 +12,5 @@ RUN set -ex ;\
         /tmp/* \
         /var/tmp/*
 
+# root CA cert expired on October 1st, 2021
+RUN yum update -y ca-certificates
diff --git a/build-tools/build-docker-images/stx-centos/Dockerfile.stable b/build-tools/build-docker-images/stx-centos/Dockerfile.stable
index bbd77d9a..b30f615a 100644
--- a/build-tools/build-docker-images/stx-centos/Dockerfile.stable
+++ b/build-tools/build-docker-images/stx-centos/Dockerfile.stable
@@ -27,3 +27,5 @@ RUN set -ex ;\
         /tmp/* \
         /var/tmp/*
 
+# root CA cert expired on October 1st, 2021
+RUN yum update -y ca-certificates
diff --git a/build-tools/build-wheels/docker/centos-dockerfile b/build-tools/build-wheels/docker/centos-dockerfile
index 11bab28e..7a3edfe7 100644
--- a/build-tools/build-wheels/docker/centos-dockerfile
+++ b/build-tools/build-wheels/docker/centos-dockerfile
@@ -32,3 +32,5 @@ RUN set -ex; \
     python get-pip.py
 COPY ${BUILD_STREAM}-wheels-py2.cfg /wheels-py2.cfg
 
+# root CA cert expired on October 1st, 2021
+RUN yum update -y ca-certificates