diff --git a/nixos-module.nix b/nixos-module.nix
index 0fd3497..16c66db 100644
--- a/nixos-module.nix
+++ b/nixos-module.nix
@@ -213,7 +213,7 @@ in
         LockPersonality = true;
         MemoryDenyWriteExecute = true;
         LimitNOFile = limitNOFILE;
-        LimitRSS = "4G:6G";
+        MemoryMax = "3G";
       };
     };
 
@@ -241,7 +241,7 @@ in
         LockPersonality = true;
         MemoryDenyWriteExecute = true;
         LimitNOFile = limitNOFILE;
-        LimitRSS = "4G:6G";
+        MemoryMax = "2G";
       };
     };
 
@@ -270,7 +270,7 @@ in
         MemoryDenyWriteExecute = true;
         LimitNOFile = limitNOFILE;
         WorkingDirectory = "${pkgs.caveman-gatherer}/share/caveman/gatherer";
-        LimitRSS = "512M:1G";
+        MemoryMax = "1G";
       };
     };