diff --git a/contrib/docker/make-dimage.sh b/contrib/docker/make-dimage.sh
index 07b10c18..219b3d2b 100755
--- a/contrib/docker/make-dimage.sh
+++ b/contrib/docker/make-dimage.sh
@@ -45,7 +45,7 @@ fi
 CONTEXT='.'
 
 DIMAGE_NAME="${DOCKER_IMAGE_NAME}"
-DIMAGE_VERSION=`date -Iseconds | sed -e 's/:/-/g'`
+DIMAGE_VERSION=`date "+%Y-%m-%dT%H:%M:%S%z" | sed -e 's/:/-/g'`
 
 DIMAGE_ID="${DIMAGE_NAME}:${DIMAGE_VERSION}"
 
diff --git a/contrib/docker/make_docker_image.sh b/contrib/docker/make_docker_image.sh
index 95908c67..5a4142c6 100755
--- a/contrib/docker/make_docker_image.sh
+++ b/contrib/docker/make_docker_image.sh
@@ -40,7 +40,7 @@ fi
 
 DFILE="Dockerfile.he-transformer"
 DIMAGE_NAME="${DOCKER_IMAGE_NAME}"
-DIMAGE_VERSION=`date -Iseconds | sed -e 's/:/-/g'`
+DIMAGE_VERSION=`date "+%Y-%m-%dT%H:%M:%S%z" | sed -e 's/:/-/g'`
 
 DIMAGE_ID="${DIMAGE_NAME}:${DIMAGE_VERSION}"