diff --git a/opc-ua-sdk/sdk-server/src/main/java/org/eclipse/milo/opcua/sdk/server/SessionManager.java b/opc-ua-sdk/sdk-server/src/main/java/org/eclipse/milo/opcua/sdk/server/SessionManager.java
index 6528f03ec..7066beacd 100644
--- a/opc-ua-sdk/sdk-server/src/main/java/org/eclipse/milo/opcua/sdk/server/SessionManager.java
+++ b/opc-ua-sdk/sdk-server/src/main/java/org/eclipse/milo/opcua/sdk/server/SessionManager.java
@@ -363,7 +363,7 @@ public CreateSessionResponse createSession(
         authenticationToken,
         revisedSessionTimeout,
         serverNonce,
-        securityConfiguration.getServerCertificateBytes(),
+        session.getEndpoint().getServerCertificate(),
         serverEndpoints,
         new SignedSoftwareCertificate[0],
         serverSignature,