diff --git a/doc/source/index.rst b/doc/source/index.rst
index f6dd81e..c4093c3 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -10,4 +10,4 @@ Software Repository for Container (SWR) provides full lifecycle container image
    .. service_card::
       :service_type: swr
       :umn: This document introduces basic concepts of Software Repository for Container and demonstrates how to use SWR features.
-      :api: This document describes application programming interfaces (APIs) of Software Repository for Container and provides API parameter description andexample values.
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+      :api-ref: This document describes application programming interfaces (APIs) of Software Repository for Container and provides API parameter description andexample values.
\ No newline at end of file