diff --git a/spack.sh b/spack.sh
index 9e46b3cf396414c7626bc682604169a23b74bf5f..ef841a3134603d5b2ee70b2a1d10d0dde93fef31 100644
--- a/spack.sh
+++ b/spack.sh
@@ -3,7 +3,7 @@ SPACK_ORGREPO="spack/spack"
 
 ## Spack github version, e.g. v0.18.1 or commit hash
 ## note: nightly builds will use e.g. releases/v0.19
-SPACK_VERSION="v0.20.1"
+SPACK_VERSION="v0.21.0"
 
 ## Space-separated list of spack cherry-picks
 read -r -d '' SPACK_CHERRYPICKS <<- \