diff --git a/B/BumpStdlibs/Versions.toml b/B/BumpStdlibs/Versions.toml
index 610004cf8de842d..d8cb84b0db965ac 100644
--- a/B/BumpStdlibs/Versions.toml
+++ b/B/BumpStdlibs/Versions.toml
@@ -33,3 +33,6 @@ git-tree-sha1 = "4672ab752a44b00db36c8847a2da17fc2582572b"
 
 ["4.1.0"]
 git-tree-sha1 = "084919bed288826576eddf3bc5d9fe2f2b6b49ba"
+
+["4.2.0"]
+git-tree-sha1 = "74eaa9485726a43783708773368ef1a41bd6fa60"