diff --git a/CHANGELOG.md b/CHANGELOG.md
index 15525bb85..cbf6352ac 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -37,6 +37,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 -   Upgraded all dependencies with `poetry up` (@Vinnybod)
 -   Upgraded Black to 23.12.0 (@Vinnybod)
 -   Upgraded Ruff to 0.19.0 (@Vinnybod)
+-   Upgraded Seatbelt to 1.2.1 (@Cx01N)
 
 ## [5.8.4] - 2023-12-22
 
diff --git a/empire/server/csharp/Covenant/Data/ReferenceSourceLibraries/Seatbelt b/empire/server/csharp/Covenant/Data/ReferenceSourceLibraries/Seatbelt
index b3556ef90..21547d74b 160000
--- a/empire/server/csharp/Covenant/Data/ReferenceSourceLibraries/Seatbelt
+++ b/empire/server/csharp/Covenant/Data/ReferenceSourceLibraries/Seatbelt
@@ -1 +1 @@
-Subproject commit b3556ef907a4b5bea2310fa5a9b4e7a734ae1379
+Subproject commit 21547d74b0059efedee05117ed2f8f01dbbd4f55