diff --git a/config/slackConfig.js b/config/slackConfig.js
index 84ab3376..109671f2 100644
--- a/config/slackConfig.js
+++ b/config/slackConfig.js
@@ -4,27 +4,30 @@ const winstonSlackWebHook = require('winston-slack-webhook').SlackWebHook;
 module.exports = (winston) => {
   if (config.logging.slackWebHook) {
     // add a transport for errors to slack
-    winston.add(winstonSlackWebHook, {
-      name      : 'slack-errors-transport',
-      level     : 'warn',
-      webhookUrl: config.logging.slackWebHook,
-      channel   : config.logging.slackErrorChannel,
-      username  : 'spee.ch',
-      iconEmoji : ':face_with_head_bandage:',
-    });
-    winston.add(winstonSlackWebHook, {
-      name      : 'slack-info-transport',
-      level     : 'info',
-      webhookUrl: config.logging.slackWebHook,
-      channel   : config.logging.slackInfoChannel,
-      username  : 'spee.ch',
-      iconEmoji : ':nerd_face:',
-    });
+    if (config.logging.slackErrorChannel) {
+      winston.add(winstonSlackWebHook, {
+        name      : 'slack-errors-transport',
+        level     : 'warn',
+        webhookUrl: config.logging.slackWebHook,
+        channel   : config.logging.slackErrorChannel,
+        username  : 'spee.ch',
+        iconEmoji : ':face_with_head_bandage:',
+      });
+    };
+    if (config.logging.slackInfoChannel) {
+      winston.add(winstonSlackWebHook, {
+        name      : 'slack-info-transport',
+        level     : 'info',
+        webhookUrl: config.logging.slackWebHook,
+        channel   : config.logging.slackInfoChannel,
+        username  : 'spee.ch',
+        iconEmoji : ':nerd_face:',
+      });
+    };
     // send test message
     winston.error('Slack "error" logging is online.');
-    winston.warn('Slack "warning" logging is online.');
     winston.info('Slack "info" logging is online.');
   } else {
-    winston.warn('Slack logging is not enabled because no SLACK_WEB_HOOK env var provided.');
+    winston.warn('Slack logging is not enabled because no slackWebHook config var provided.');
   }
 };