diff --git a/2021/Flynn b/2021/Flynn
index 7a9fc6e..16a5920 160000
--- a/2021/Flynn
+++ b/2021/Flynn
@@ -1 +1 @@
-Subproject commit 7a9fc6e4a9929e9ee35ea6ec3d324415a5f6d53c
+Subproject commit 16a5920190f628bf2410f56674b192ff00d5f311
diff --git a/2021/robbe b/2021/robbe
index 189a0a7..647eb44 160000
--- a/2021/robbe
+++ b/2021/robbe
@@ -1 +1 @@
-Subproject commit 189a0a7b0af07b87a18198c357f38a3c05c2ec1a
+Subproject commit 647eb444fc3276835ccdeb557c2c58b46a7e6402
diff --git a/2021/silvius b/2021/silvius
index 6dfb9d8..d0f51f4 160000
--- a/2021/silvius
+++ b/2021/silvius
@@ -1 +1 @@
-Subproject commit 6dfb9d8a500c69be81927b3098771782d54d45a8
+Subproject commit d0f51f44d80b83e693ccdc15d6c5bf51ef32a368