diff --git a/C/CounterfactualExplanations/Versions.toml b/C/CounterfactualExplanations/Versions.toml
index d63fdb084200394..5caa6250defee83 100644
--- a/C/CounterfactualExplanations/Versions.toml
+++ b/C/CounterfactualExplanations/Versions.toml
@@ -60,3 +60,6 @@ git-tree-sha1 = "53a3a3c91f694a8dcbe2ae3e4f40b89f5b6031ee"
 
 ["0.1.20"]
 git-tree-sha1 = "6cd46eda67b19a577a14eb8a7287197fcb8e9954"
+
+["0.1.21"]
+git-tree-sha1 = "04acac995c56d1609277848e3bdd035e89b712c2"