diff --git a/M/ManifoldsBase/Versions.toml b/M/ManifoldsBase/Versions.toml
index 205afc38ec81311..2b2465aa02b9685 100644
--- a/M/ManifoldsBase/Versions.toml
+++ b/M/ManifoldsBase/Versions.toml
@@ -126,3 +126,6 @@ git-tree-sha1 = "2ff074880133057c85c0d72bcb15300d4b45a39c"
 
 ["0.12.3"]
 git-tree-sha1 = "117f1676d28c5546939108bf09495d0f24465dc9"
+
+["0.12.4"]
+git-tree-sha1 = "c498909007b349076d3ec942667fa38a9ee831bc"