diff --git a/tutorial/tutorial_10_peerstore.cpp b/tutorial/tutorial_10_peerstore.cpp
index eb21fd8..e9d239a 100644
--- a/tutorial/tutorial_10_peerstore.cpp
+++ b/tutorial/tutorial_10_peerstore.cpp
@@ -14,6 +14,9 @@
 ///   - Manually add peers to the store
 ///   - Update addresses and protocols
 ///   - Delete peers from the store
+///
+/// -----------
+
 #include <cstdio>
 #include <string>
 #include <vector>
diff --git a/tutorial/tutorial_11_circuit_relay.cpp b/tutorial/tutorial_11_circuit_relay.cpp
index 9d4da4d..80cdb2e 100644
--- a/tutorial/tutorial_11_circuit_relay.cpp
+++ b/tutorial/tutorial_11_circuit_relay.cpp
@@ -29,6 +29,9 @@
 ///
 /// > **Note**: Circuit relay adds latency and bandwidth overhead on the
 /// > relay node. Use it only when direct connections are impossible.
+///
+/// -----------
+
 #include <cstdio>
 #include <chrono>
 #include <cstdint>
diff --git a/tutorial/tutorial_9_service_discovery.cpp b/tutorial/tutorial_9_service_discovery.cpp
index 3ce89f6..5467840 100644
--- a/tutorial/tutorial_9_service_discovery.cpp
+++ b/tutorial/tutorial_9_service_discovery.cpp
@@ -21,6 +21,9 @@
 ///     /       \
 ///   Advertiser  Discoverer
 /// ```
+///
+/// -----------
+
 #include <cstdio>
 #include <chrono>
 #include <thread>