diff --git a/.tgs.yml b/.tgs.yml
index dd18c3b8a2577..8aedea02b4e8f 100644
--- a/.tgs.yml
+++ b/.tgs.yml
@@ -3,7 +3,7 @@
 version: 1
 # The BYOND version to use (kept in sync with dependencies.sh by the "TGS Test Suite" CI job)
 # Must be interpreted as a string, keep quoted
-byond: "515.1637"
+byond: "515.1647"
 # Folders to create in "<instance_path>/Configuration/GameStaticFiles/"
 static_files:
   # Config directory should be static
diff --git a/dependencies.sh b/dependencies.sh
index 1046b72c12d77..c7086bb55451b 100644
--- a/dependencies.sh
+++ b/dependencies.sh
@@ -3,9 +3,9 @@
 #Project dependencies file
 #Final authority on what's required to fully build the project
 
-# byond version
+# byond version. Also must be updated in .tgs.yml
 export BYOND_MAJOR=515
-export BYOND_MINOR=1637
+export BYOND_MINOR=1647
 
 #rust_g git tag
 export RUST_G_VERSION=3.5.1