diff --git a/CHANGELOG.md b/CHANGELOG.md
index 760456a2..53ccf1d5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,7 +16,7 @@ will consitute of a breaking change warranting a new major release:
 
 # [unreleased]
 
-# [v4.0.0] to be released
+# [v4.0.0] 2023-06-22
 
 - `eive-tmtc` version v5.0.0
 - `q7s-package` version v3.1.1
diff --git a/release_checklist.md b/release-checklist.md
similarity index 100%
rename from release_checklist.md
rename to release-checklist.md
diff --git a/tmtc b/tmtc
index 5db9f383..c9f4a807 160000
--- a/tmtc
+++ b/tmtc
@@ -1 +1 @@
-Subproject commit 5db9f383a6f7349bb0736442ecdf6ff2164b0632
+Subproject commit c9f4a8070d20bc659809d5b822ac5a17548f57a4