diff --git a/README.md b/README.md
index 5110217..9602cd3 100644
--- a/README.md
+++ b/README.md
@@ -53,3 +53,7 @@ services:
       - DISABLE_CONFD=y
 ```
 
+## Images
+There are two available images for you to choose from. The default one (0.*n*) is based on
+Debian 10, with Icinga2 from Icings official repository. The other image (0.*n*-alpine) is
+based on Alpine 3.11, with Icinga2 from Alpines repository. The Alpine image is much smaller.