diff --git a/book/src/SUMMARY.md b/book/src/SUMMARY.md
index 884d2fc67..5685defd2 100644
--- a/book/src/SUMMARY.md
+++ b/book/src/SUMMARY.md
@@ -20,6 +20,7 @@
     - [Shielded Scanning gRPC Server](user/shielded-scan-grpc-server.md)
   - [Kibana blockchain explorer](user/elasticsearch.md)
   - [Forking the Zcash Testnet with Zebra](user/fork-zebra-testnet.md)
+    [OpenAPI specification](user/openapi.md)
   - [Troubleshooting](user/troubleshooting.md)
 - [Developer Documentation](dev.md)
   - [Contribution Guide](CONTRIBUTING.md)