diff --git a/.gitmodules b/.gitmodules
index ab329ea..fea1973 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -187,3 +187,6 @@
 [submodule "nimble/eventqueue"]
 	path = nimble/eventqueue
 	url = https://github.com/disruptek/eventqueue.git
+[submodule "icalendar_actor"]
+	path = icalendar_actor
+	url = https://git.syndicate-lang.org/ehmry/icalendar_actor.git
diff --git a/icalendar_actor b/icalendar_actor
new file mode 160000
index 0000000..2dde9d7
--- /dev/null
+++ b/icalendar_actor
@@ -0,0 +1 @@
+Subproject commit 2dde9d75ed743837c5314555da5e212766d825f4
diff --git a/preserves-nim b/preserves-nim
index 4bfd7e9..8b3b182 160000
--- a/preserves-nim
+++ b/preserves-nim
@@ -1 +1 @@
-Subproject commit 4bfd7e9efa45fa309b1e60b5346d86c95c88c67c
+Subproject commit 8b3b182ce791811ed6c3524e25adfc0a2a530b71
diff --git a/syndicate-nim b/syndicate-nim
index dc36161..d86ef24 160000
--- a/syndicate-nim
+++ b/syndicate-nim
@@ -1 +1 @@
-Subproject commit dc361618644690c48e2eb09d5c8216544465766c
+Subproject commit d86ef24c01850c6919c9128d20e80ba37476e4f3
diff --git a/syndicate_utils b/syndicate_utils
index ef38792..3e5f791 160000
--- a/syndicate_utils
+++ b/syndicate_utils
@@ -1 +1 @@
-Subproject commit ef3879297018ce32e4cda7de56869f31377bc675
+Subproject commit 3e5f791d70050f41816ee4e77efbbd307b7f92e9