diff --git a/examples/BroadcastingEchoServer.cpp b/examples/BroadcastingEchoServer.cpp
index a7049a0..c8f391f 100644
--- a/examples/BroadcastingEchoServer.cpp
+++ b/examples/BroadcastingEchoServer.cpp
@@ -16,6 +16,7 @@ int main() {
         .idleTimeout = 10,
         .maxBackpressure = 1 * 1024 * 1024,
         /* Handlers */
+        .upgrade = nullptr,
         .open = [](auto *ws) {
             /* Let's make every connection subscribe to the "broadcast" topic */
             ws->subscribe("broadcast");
diff --git a/examples/EchoServer.cpp b/examples/EchoServer.cpp
index a6d231b..b1f19e4 100644
--- a/examples/EchoServer.cpp
+++ b/examples/EchoServer.cpp
@@ -24,6 +24,7 @@ int main() {
         .idleTimeout = 10,
         .maxBackpressure = 1 * 1024 * 1024,
         /* Handlers */
+        .upgrade = nullptr,
         .open = [](auto *ws) {
             /* Open event here, you may access ws->getUserData() which points to a PerSocketData struct */
         },
diff --git a/examples/EchoServerThreaded.cpp b/examples/EchoServerThreaded.cpp
index 9ae4401..c511ba4 100644
--- a/examples/EchoServerThreaded.cpp
+++ b/examples/EchoServerThreaded.cpp
@@ -22,6 +22,7 @@ int main() {
                 .idleTimeout = 10,
                 .maxBackpressure = 1 * 1024 * 1024,
                 /* Handlers */
+                .upgrade = nullptr,
                 .open = [](auto *ws) {
 
                 },