diff --git a/MPI/boost/files/variants.rhel6 b/MPI/boost/files/variants.rhel6
index a71432e..8d970cd 100644
--- a/MPI/boost/files/variants.rhel6
+++ b/MPI/boost/files/variants.rhel6
@@ -17,5 +17,5 @@ boost/1.68.0-1       stable	gcc/7.3.0 mpich/3.3 b:zlib/1.2.11
 boost/1.70.0         stable	gcc/7.3.0 openmpi/3.1.3 b:zlib/1.2.11
 boost/1.70.0         stable	gcc/7.4.0 openmpi/3.1.4 b:zlib/1.2.11
 
-boost/1.70.0         unstable	gcc/{7.5.0,8.4.0,9.3.0,10.1.0} openmpi/3.1.6 b:zlib/1.2.11
-boost/1.73.0         unstable	gcc/{7.5.0,8.4.0,9.3.0,10.1.0} openmpi/3.1.6 b:zlib/1.2.11
+boost/1.70.0         stable	gcc/{7.5.0,8.4.0,9.3.0,10.1.0} openmpi/3.1.6 b:zlib/1.2.11
+boost/1.73.0         stable	gcc/{7.5.0,8.4.0,9.3.0,10.1.0} openmpi/3.1.6 b:zlib/1.2.11