diff --git a/lib/client.js b/lib/client.js
index 1525fa0b5e..e3128616cb 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -396,7 +396,7 @@ class Client extends EventEmitter {
       if (i > 0) str += ', ';
       let value = values[i];
       // json columns can have object in values.
-      if (isPlainObject(value)) {
+      if (isPlainObject(value) || Array.isArray(value)) {
         value = JSON.stringify(value);
       }
       str += this.parameter(