diff --git a/stacks/dlrs/mkl/README.md b/stacks/dlrs/mkl/README.md
index 7ac83fd..4841392 100644
--- a/stacks/dlrs/mkl/README.md
+++ b/stacks/dlrs/mkl/README.md
@@ -7,9 +7,10 @@
 Default build args in Docker are on: https://docs.docker.com/engine/reference/builder/#arg
 
 ```
-docker build --no-cache -t clearlinux/stacks-dlrs-mkl .
+docker build --no-cache -t clearlinux/stacks-dlrs-mkl --build-arg swupd_args="-m 26700" .
 ```
 
-### Optional Build ARGs
+### Build ARGs
 
 * `swupd_args` specifies [swupd update](https://clearlinux.org/documentation/clear-linux/guides/maintenance/swupd-guide#perform-a-manual-update) flags passed to the update during build.
+NOTE: `swupd_args` defaults so that the Clear Linux OS version is updated to 26700. Upgrading to a later version is not recommended, as further versions have not been validated.
diff --git a/stacks/dlrs/oss/README.md b/stacks/dlrs/oss/README.md
index 203c5e2..cf6901c 100644
--- a/stacks/dlrs/oss/README.md
+++ b/stacks/dlrs/oss/README.md
@@ -7,9 +7,10 @@
 Default build args in Docker are on: https://docs.docker.com/engine/reference/builder/#arg
 
 ```
-docker build --no-cache -t clearlinux/stacks-dlrs-oss .
+docker build --no-cache -t clearlinux/stacks-dlrs-oss --build-arg swupd_args="-m 26700" .
 ```
 
 ### Optional Build ARGs
 
 * `swupd_args` specifies [swupd update](https://clearlinux.org/documentation/clear-linux/guides/maintenance/swupd-guide#perform-a-manual-update) flags passed to the update during build.
+NOTE: `swupd_args` defaults so that the Clear Linux OS version is updated to 26700. Upgrading to a later version is not recommended, as further versions have not been validated.