diff --git a/lib/iosbplayer.js b/lib/iosbplayer.js
index b70fe34..6c632e3 100755
--- a/lib/iosbplayer.js
+++ b/lib/iosbplayer.js
@@ -747,6 +747,13 @@ function ioSBPlayer(server,playerdata) {
             }
         }
         if (idParts[0] == 'cmdGoTime') {
+            // state.val needs to be a string, although the time is set in seconds
+            // when settings cmdGoTime via ioBroker.simple-api its not possible to submit a number as string
+            // if we receive a number, we need to cast this to a string
+            if (typeof state.val === 'number') {
+                state.val = state.val.toString();
+            }
+
             if (state.val.trim()!=='' && !isNaN(state.val.trim())) {
                 this.request(this.playerid,['time', state.val.trim()]);
                 this.setState(idParts[0],' ',this.statePath,this.playername,false);