diff --git a/docs/api-reference/index.md b/docs/api-reference/index.md
index c012d392..a6e42c40 100644
--- a/docs/api-reference/index.md
+++ b/docs/api-reference/index.md
@@ -37,6 +37,7 @@
    grouping
    logging
    masking
+   peaks
    smoothing
    transform
    types