diff --git a/README.md b/README.md
index 7463f274..a651258e 100644
--- a/README.md
+++ b/README.md
@@ -610,6 +610,7 @@
 * Get 500 kills to win the game
 * Starts at round 1
 * Round increments every 30 seconds (up to round 20)
+* 1 second initial zombie spawn rate (increases every round)
 * Players respawn after being down for 10 seconds
 * Players retain perks
 
diff --git a/scripts/zm/zgrief/zgrief_reimagined.gsc b/scripts/zm/zgrief/zgrief_reimagined.gsc
index f5f3c262..5863b7c7 100644
--- a/scripts/zm/zgrief/zgrief_reimagined.gsc
+++ b/scripts/zm/zgrief/zgrief_reimagined.gsc
@@ -2559,7 +2559,7 @@ race_think()
 	setroundsplayed(level.round_number);
 
 	level.zombie_move_speed = 36;
-	level.zombie_vars["zombie_spawn_delay"] = 0.5;
+	level.zombie_vars["zombie_spawn_delay"] = 1;
 
 	level.brutus_health = int(level.brutus_health_increase * level.round_number);
 	level.brutus_expl_dmg_req = int(level.brutus_explosive_damage_increase * level.round_number);
@@ -2583,6 +2583,8 @@ race_think()
 			level.zombie_move_speed = move_speed;
 		}
 
+		level.zombie_vars["zombie_spawn_delay"] *= 0.95;
+
 		level.brutus_health = int(level.brutus_health_increase * level.round_number);
 		level.brutus_expl_dmg_req = int(level.brutus_explosive_damage_increase * level.round_number);