diff --git a/client/ayon_core/hosts/nuke/plugins/publish/validate_knobs.py b/client/ayon_core/hosts/nuke/plugins/publish/validate_knobs.py
index 281e172788..8bcde9609d 100644
--- a/client/ayon_core/hosts/nuke/plugins/publish/validate_knobs.py
+++ b/client/ayon_core/hosts/nuke/plugins/publish/validate_knobs.py
@@ -1,3 +1,5 @@
+import json
+
 import nuke
 import six
 import pyblish.api