diff --git a/2021/chvp b/2021/chvp
index 59b657d..51e95ed 160000
--- a/2021/chvp
+++ b/2021/chvp
@@ -1 +1 @@
-Subproject commit 59b657d36087650112f7871df9fc4eacb1cf01ba
+Subproject commit 51e95ed3241e7c87425c7f9edeef77ad26628721
diff --git a/2021/ninewise b/2021/ninewise
index bf39b92..1feda86 160000
--- a/2021/ninewise
+++ b/2021/ninewise
@@ -1 +1 @@
-Subproject commit bf39b92abbb96aef1aa66d643da17c1fc93718b5
+Subproject commit 1feda8609355a108997714fb0c6fa9110e564df9
diff --git a/2021/robbe b/2021/robbe
index 69e9e93..841591c 160000
--- a/2021/robbe
+++ b/2021/robbe
@@ -1 +1 @@
-Subproject commit 69e9e9391bc6c615bab9fe92f1bee163fd183afe
+Subproject commit 841591c76dd4ba2d442c02a983b7efb2857b441c
diff --git a/2021/silvius b/2021/silvius
index f8de037..75c2fed 160000
--- a/2021/silvius
+++ b/2021/silvius
@@ -1 +1 @@
-Subproject commit f8de0371163a248dc5c47ce20babb1f2fd2e2510
+Subproject commit 75c2fed1c1bf40c25da9ded38807742253c10066