diff --git a/conf/e3/config.xml b/conf/e3/config.xml
index 55d020ae6..36b5a692c 100644
--- a/conf/e3/config.xml
+++ b/conf/e3/config.xml
@@ -118,6 +118,7 @@
     <param name="study.speedup" value="0"/>
     <param name="world.era" value="3"/>
     <param name="rules.migrants" value="0"/>
+    <param name="rules.monsters.attack_chance" value="0.1"/>
     <param name="rules.transfermen" value="0"/>
     <param name="rules.stealth.faction" value="1"/>
     <param name="rules.stealth.anon_battle" value="0"/>
diff --git a/critbit b/critbit
index 2a7af5e23..2d901a238 160000
--- a/critbit
+++ b/critbit
@@ -1 +1 @@
-Subproject commit 2a7af5e2347217ea4efcf7fb3f0bc9c2681d1a17
+Subproject commit 2d901a238b98b14204f9118abc5040ff4904052c
diff --git a/src/kernel/config.h b/src/kernel/config.h
index 4a2870f81..1305bd473 100644
--- a/src/kernel/config.h
+++ b/src/kernel/config.h
@@ -65,9 +65,6 @@ extern "C" {
 #define PLAGUE_HEALCHANCE  0.25F        /* Wahrscheinlichkeit Heilung */
 #define PLAGUE_HEALCOST    30   /* Heilkosten */
 
-    /* Chance of a monster attack */
-#define MONSTERATTACK  0.4F
-
     /* Bewegungsweiten: */
 #define BP_WALKING 4
 #define BP_RIDING  6
diff --git a/src/monsters.c b/src/monsters.c
index af35dc54f..0edc5cda2 100644
--- a/src/monsters.c
+++ b/src/monsters.c
@@ -132,6 +132,10 @@ static void reduce_weight(unit * u)
   }
 }
 
+static float monster_attack_chance(void) {
+    return get_param_flt(global.parameters, "rules.monsters.attack_chance", 0.4f);
+}
+
 static order *monster_attack(unit * u, const unit * target)
 {
   if (u->region != target->region)
@@ -747,7 +751,7 @@ void plan_monsters(faction * f)
 
   for (r = regions; r; r = r->next) {
     unit *u;
-    double attack_chance = MONSTERATTACK;
+    double attack_chance = monster_attack_chance();
     bool attacking = false;
 
     for (u = r->units; u; u = u->next) {