diff --git a/lib/utils.js b/lib/utils.js
index 8dba5e1a..423db4df 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -35,6 +35,14 @@ function validateTopics (topics) {
       return typeof topic.partition !== 'number';
     }
     return false;
+  })) {
+    throw new InvalidConfigError('Partition must be a number and can not contain characters');
+  }
+  if (topics.some(function (topic) {
+    if ('offset' in topic) {
+      return typeof topic.offset !== 'number';
+    }
+    return false;
   })) {
     throw new InvalidConfigError('Offset must be a number and can not contain characters');
   }