diff --git a/client/ayon_core/plugins/publish/extract_color_transcode.py b/client/ayon_core/plugins/publish/extract_color_transcode.py
index 1e86b91484..8a276cf608 100644
--- a/client/ayon_core/plugins/publish/extract_color_transcode.py
+++ b/client/ayon_core/plugins/publish/extract_color_transcode.py
@@ -58,7 +58,7 @@ class ExtractOIIOTranscode(publish.Extractor):
     optional = True
 
     # Supported extensions
-    supported_exts = ["exr", "jpg", "jpeg", "png", "dpx"]
+    supported_exts = {"exr", "jpg", "jpeg", "png", "dpx"}
 
     # Configurable by Settings
     profiles = None
diff --git a/client/ayon_core/plugins/publish/extract_review.py b/client/ayon_core/plugins/publish/extract_review.py
index 3fc2185d1a..89bc56c670 100644
--- a/client/ayon_core/plugins/publish/extract_review.py
+++ b/client/ayon_core/plugins/publish/extract_review.py
@@ -135,11 +135,11 @@ class ExtractReview(pyblish.api.InstancePlugin):
     ]
 
     # Supported extensions
-    image_exts = ["exr", "jpg", "jpeg", "png", "dpx", "tga", "tiff", "tif"]
-    video_exts = ["mov", "mp4"]
-    supported_exts = image_exts + video_exts
+    image_exts = {"exr", "jpg", "jpeg", "png", "dpx", "tga", "tiff", "tif"}
+    video_exts = {"mov", "mp4"}
+    supported_exts = image_exts | video_exts
 
-    alpha_exts = ["exr", "png", "dpx"]
+    alpha_exts = {"exr", "png", "dpx"}
 
     # Preset attributes
     profiles = []