diff --git a/Well-known-struct-tags.md b/Well-known-struct-tags.md
index 17dac5b..945fb01 100644
--- a/Well-known-struct-tags.md
+++ b/Well-known-struct-tags.md
@@ -31,4 +31,6 @@
 json      | https://godoc.org/encoding/json
 asn1      | https://godoc.org/encoding/asn1
 reform    | https://godoc.org/gopkg.in/reform.v1
+bigquery  | https://godoc.org/cloud.google.com/go/bigquery
 datastore | https://godoc.org/cloud.google.com/go/datastore
+spanner   | https://godoc.org/cloud.google.com/go/spanner