diff --git a/spack b/spack
index 76bf231c0..595a31bd0 160000
--- a/spack
+++ b/spack
@@ -1 +1 @@
-Subproject commit 76bf231c08097be24a7a851f5bdca1ca15c1f53b
+Subproject commit 595a31bd0bb05a7e2017facc41552722919a8aaa