diff --git a/satella/__init__.py b/satella/__init__.py
index 6d2db50c097c278d885331e65be7b51a2178f18b..307e8a44bfbf2129fefed0624b019103c0499f9b 100644
--- a/satella/__init__.py
+++ b/satella/__init__.py
@@ -1 +1 @@
-__version__ = '2.19.0'
+__version__ = '2.19.1'
diff --git a/satella/coding/structures/zip_dict.py b/satella/coding/structures/zip_dict.py
index 0459607c19d452c9d60b885a98501fd05ae66bf8..56ab1670236e5ad7f4dcf3a1008191d1d26af0be 100644
--- a/satella/coding/structures/zip_dict.py
+++ b/satella/coding/structures/zip_dict.py
@@ -15,6 +15,7 @@ class SetZip:
     """
     def __iadd__(self, other: set):
         self.args.append(other)
+        return self
 
     def __init__(self, *args: set):
         self.args = list(args)