diff --git a/dependencies.sh b/dependencies.sh
index 1e873002c52..0fbad2153cf 100755
--- a/dependencies.sh
+++ b/dependencies.sh
@@ -4,8 +4,8 @@
 #Final authority on what's required to fully build the project
 
 # byond version
-export BYOND_MAJOR=514
-export BYOND_MINOR=1554
+export BYOND_MAJOR=513
+export BYOND_MINOR=1536
 
 #rust_g git tag
 export RUST_G_VERSION=0.4.7
@@ -15,7 +15,7 @@ export NODE_VERSION=12
 export NODE_VERSION_PRECISE=12.20.0
 
 # SpacemanDMM git tag
-export SPACEMAN_DMM_VERSION=suite-1.7
+export SPACEMAN_DMM_VERSION=suite-1.6
 
 # Extools git tag
 export EXTOOLS_VERSION=v0.0.7
diff --git a/tools/LinuxOneShot/docker-compose.yml b/tools/LinuxOneShot/docker-compose.yml
index 594ccc59f4c..c7002f45652 100644
--- a/tools/LinuxOneShot/docker-compose.yml
+++ b/tools/LinuxOneShot/docker-compose.yml
@@ -38,7 +38,7 @@ services:
       driver: none
   setup:
     environment:
-      TGS_BYOND: 514.1554
+      TGS_BYOND: 513.1514
       TGS_REPO: https://github.com/tgstation/tgstation
     build:
       context: ./SetupProgram