diff --git a/_build_dependencies.sh b/_build_dependencies.sh
index 8427e6976ee..3aabf9e3758 100644
--- a/_build_dependencies.sh
+++ b/_build_dependencies.sh
@@ -6,4 +6,4 @@ export NODE_VERSION=12
 # Byond Major
 export BYOND_MAJOR=514
 # Byond Minor
-export BYOND_MINOR=1556
+export BYOND_MINOR=1566
diff --git a/code/modules/client/client_procs.dm b/code/modules/client/client_procs.dm
index af91031e434..8150d4a70a0 100644
--- a/code/modules/client/client_procs.dm
+++ b/code/modules/client/client_procs.dm
@@ -9,7 +9,7 @@
 #define MIN_CLIENT_VERSION	513		// Minimum byond major version required to play.
 									//I would just like the code ready should it ever need to be used.
 #define SUGGESTED_CLIENT_VERSION	514		// only integers (e.g: 513, 514) are useful here. This is the part BEFORE the ".", IE 513 out of 513.1542
-#define SUGGESTED_CLIENT_BUILD	1556		// only integers (e.g: 1542, 1543) are useful here. This is the part AFTER the ".", IE 1542 out of 513.1542
+#define SUGGESTED_CLIENT_BUILD	1566		// only integers (e.g: 1542, 1543) are useful here. This is the part AFTER the ".", IE 1542 out of 513.1542
 
 #define SSD_WARNING_TIMER 30 // cycles, not seconds, so 30=60s