diff --git a/toolchain/constraint/libc/gnu/versions.bzl b/toolchain/constraint/libc/gnu/versions.bzl
index ba04cd0b6f7a9d571572dfcfbeb0ff7d82acc4d5..0b81728aecb1b66b0a88eb5499cc99f362e56215 100644
--- a/toolchain/constraint/libc/gnu/versions.bzl
+++ b/toolchain/constraint/libc/gnu/versions.bzl
@@ -74,4 +74,6 @@ VERSIONS = (
     "2.36",
     "2.37",
     "2.38",
+    "2.39",
+    "2.40",
 )