diff --git a/openpype/plugins/publish/extract_review.py b/openpype/plugins/publish/extract_review.py
index 7284483f5f..264b362558 100644
--- a/openpype/plugins/publish/extract_review.py
+++ b/openpype/plugins/publish/extract_review.py
@@ -649,6 +649,8 @@ class ExtractReview(pyblish.api.InstancePlugin):
             AssertionError: if more then one collection is obtained.
 
         """
+        start_frame = int(start_frame)
+        end_frame = int(end_frame)
         collections = clique.assemble(files)[0]
         assert len(collections) == 1, "Multiple collections found."
         col = collections[0]