diff --git a/README.md b/README.md
index 2855cca3..c6bc0cbe 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,10 @@ COPY hermit-loader-x86_64 hermit/hermit-loader
 COPY httpd hermit/httpd
 CMD ["/hermit/httpd"]
 ```
-
+The base image `hermit_env` includes an hypervisor, which is able to boot _Hermit OS_ applications.
+The image based on _Ubuntu_.
+To reduce the image size, the base image _hermit_env_alpine_ can be used.
+This image based on [Alpine Linux](https://www.alpinelinux.org), which is a security-oriented, lightweight Linux distribution.
 Afterwards, the container image can be created and pushed to the registry.
 The registery tag has to replace with the enduser registry.