diff --git a/unix/vncserver b/unix/vncserver
index 6e1baa8..750db57 100755
--- a/unix/vncserver
+++ b/unix/vncserver
@@ -1110,7 +1110,7 @@ sub DefineFilePathsAndStuff {
 }
 
 sub ParseAndProcessCliOptions {
-  my @supportedOptions = ("-geometry",1,"-depth",1,"-pixelformat",1,"-name",1,"-kill",1,"-help",0,"-h",0,"--help",0,"-fp",1,"-list",0,"-fg",0,"-autokill",0,"-noxstartup",0,"-xstartup",1,"-select-de",OPTIONAL_ARG_VALUE, "-interface", REQUIRED_ARG_VALUE, '-debug', NO_ARG_VALUE);
+  my @supportedOptions = ("-geometry",1,"-depth",1,"-pixelformat",1,"-name",1,"-kill",1,"-help",0,"-h",0,"--help",0,"-fp",1,"-list",0,"-fg",0,"-autokill",0,"-noxstartup",0,"-xstartup",1,"-select-de",OPTIONAL_ARG_VALUE, "-interface", REQUIRED_ARG_VALUE, '-debug', NO_ARG_VALUE, '-websocketPort', REQUIRED_ARG_VALUE);
   ParseOptionsAndRemoveMatchesFromARGV(@supportedOptions);
   ProcessCliOptions();
   CheckGeometryAndDepthAreSensible();
@@ -1133,7 +1133,8 @@ sub PrepareDefaultsForPassingToXvnc {
   %default_opts;
   %config;
 
-  $websocketPort = $defaultWebsocketPort + $displayNumber;
+  $websocketPort = $opt{"-websocketPort"} || \
+    GenerateWebsocketPortFromDisplayNumber();
   $desktopName = $opt{'-name'} || "$host:$displayNumber ($ENV{USER})";
 
   SetReasonabeDefaults();
@@ -1141,6 +1142,10 @@ sub PrepareDefaultsForPassingToXvnc {
   CheckBrowserHostDefined();
 }
 
+sub GenerateWebsocketPortFromDisplayNumber {
+  $defaultWebsocketPort + $displayNumber;
+}
+
 sub EnsureAtLeastOneKasmUserExists {
   @kasmPasswdUsers = LoadKasmPasswdUsers();
   if (!AtLeastOneUserConfigured()) {