diff --git a/src/main/java/org/jitsi/jicofo/auth/ShibbolethHandler.java b/src/main/java/org/jitsi/jicofo/auth/ShibbolethHandler.java
index 976e8de4e7..52bb1eb459 100644
--- a/src/main/java/org/jitsi/jicofo/auth/ShibbolethHandler.java
+++ b/src/main/java/org/jitsi/jicofo/auth/ShibbolethHandler.java
@@ -229,6 +229,7 @@ private void doHandle(
             return;
         }
 
+        response.setContentType("text/html");
         PrintWriter responseWriter = response.getWriter();
 
         String displayName = getShibAttr(request, "displayName");