diff --git a/nightly/conf/nightly.conf b/nightly/conf/nightly.conf
index 0c1ee5f4e..c817a3000 100644
--- a/nightly/conf/nightly.conf
+++ b/nightly/conf/nightly.conf
@@ -5,7 +5,7 @@ ABT_JOBS=5
 ABT_KERNELS="  \
 3.14.5         \
 3.13.11        \
-3.12.20-nc     \
+3.12.21-nc     \
 3.11.10-nc     \
 3.10.41-nc     \
 3.9.11-nc      \