diff --git a/immuneML/environment/Constants.py b/immuneML/environment/Constants.py
index 7466002fc..b27bae3c1 100644
--- a/immuneML/environment/Constants.py
+++ b/immuneML/environment/Constants.py
@@ -1,6 +1,6 @@
 class Constants:
 
-    VERSION = "2.1.0"
+    VERSION = "2.1.1"
 
     # encoding constants
     FEATURE_DELIMITER = "///"