diff --git a/Z/ZXCalculus/Versions.toml b/Z/ZXCalculus/Versions.toml
index b0396f9eb585bc0..daf1ce513dce789 100644
--- a/Z/ZXCalculus/Versions.toml
+++ b/Z/ZXCalculus/Versions.toml
@@ -15,3 +15,6 @@ git-tree-sha1 = "da4867c3550db21f933283d5f5bee2f9f45f0aca"
 
 ["0.3.0"]
 git-tree-sha1 = "d6a71db7ca05dc2a33ade9b015df651e8731ea4b"
+
+["0.3.1"]
+git-tree-sha1 = "77c011cae371950f742025d8358e51efdb1bd587"