diff --git a/demoiselle_custom_physics.lua b/demoiselle_custom_physics.lua
index 169d2ab..fa36684 100644
--- a/demoiselle_custom_physics.lua
+++ b/demoiselle_custom_physics.lua
@@ -38,6 +38,6 @@ function demoiselle.physics(self)
 		self.object:set_velocity(vnew)
 	end
 
-    self.object:set_acceleration({x=0,y=mobkit.gravity,z=0})
+    self.object:set_acceleration({x=0,y=airutils.gravity,z=0})
 
 end
diff --git a/demoiselle_entities.lua b/demoiselle_entities.lua
index 5240dd9..635c9e8 100644
--- a/demoiselle_entities.lua
+++ b/demoiselle_entities.lua
@@ -119,7 +119,7 @@ minetest.register_entity("demoiselle:demoiselle", {
     end,
 
 	on_activate = function(self, staticdata, dtime_s)
-        mobkit.actfunc(self, staticdata, dtime_s)
+        airutils.actfunc(self, staticdata, dtime_s)
         if staticdata ~= "" and staticdata ~= nil then
             local data = minetest.deserialize(staticdata) or {}
             self._energy = data.stored_energy
@@ -147,11 +147,11 @@ minetest.register_entity("demoiselle:demoiselle", {
 		self.object:set_armor_groups({immortal=1})
 	end,
 
-    --on_step = mobkit.stepfunc,
+    --on_step = airutils.stepfunc,
     on_step = function(self,dtime,colinfo)
 	    self.dtime = math.min(dtime,0.2)
 	    self.colinfo = colinfo
-	    self.height = mobkit.get_box_height(self)
+	    self.height = airutils.get_box_height(self)
 	    
     --  physics comes first
 	    local vel = self.object:get_velocity()
@@ -230,8 +230,8 @@ minetest.register_entity("demoiselle:demoiselle", {
                 -- deal with painting or destroying
 		        if not self.driver and toolcaps and toolcaps.damage_groups
                         and toolcaps.damage_groups.fleshy and item_name ~= airutils.fuel then
-			        --mobkit.hurt(self,toolcaps.damage_groups.fleshy - 1)
-			        --mobkit.make_sound(self,'hit')
+			        --airutils.hurt(self,toolcaps.damage_groups.fleshy - 1)
+			        --airutils.make_sound(self,'hit')
                     self.hp_max = self.hp_max - 10
                     minetest.sound_play("collision", {
                         object = self.object,
diff --git a/demoiselle_utilities.lua b/demoiselle_utilities.lua
index 5009b9e..6eb05ab 100644
--- a/demoiselle_utilities.lua
+++ b/demoiselle_utilities.lua
@@ -138,7 +138,7 @@ function demoiselle.testImpact(self, velocity, position)
     if self._last_vel == nil then return end
     --lets calculate the vertical speed, to avoid the bug on colliding on floor with hard lag
     if abs(velocity.y - self._last_vel.y) > 2 then
-		local noded = mobkit.nodeatpos(mobkit.pos_shift(p,{y=-2.8}))
+		local noded = airutils.nodeatpos(airutils.pos_shift(p,{y=-2.8}))
 	    if (noded and noded.drawtype ~= 'airlike') then
 		    collision = true
 	    else
@@ -245,7 +245,7 @@ function demoiselle.flightstep(self)
     if newroll > 360 then newroll = newroll - 360 end
     if newroll < -360 then newroll = newroll + 360 end
 
-    local hull_direction = mobkit.rot_to_dir(rotation) --minetest.yaw_to_dir(yaw)
+    local hull_direction = airutils.rot_to_dir(rotation) --minetest.yaw_to_dir(yaw)
     local nhdir = {x=hull_direction.z,y=0,z=-hull_direction.x}		-- lateral unit vector
 
     local longit_speed = vector.dot(velocity,hull_direction)
@@ -259,7 +259,7 @@ function demoiselle.flightstep(self)
     local accel = vector.add(longit_drag,later_drag)
     local stop = false
 
-    local node_bellow = mobkit.nodeatpos(mobkit.pos_shift(curr_pos,{y=-0.1}))
+    local node_bellow = airutils.nodeatpos(airutils.pos_shift(curr_pos,{y=-0.1}))
     local is_flying = true
     if self.colinfo then
         is_flying = not self.colinfo.touching_ground
diff --git a/mod.conf b/mod.conf
index 12723f0..79f5ebf 100644
--- a/mod.conf
+++ b/mod.conf
@@ -1,5 +1,5 @@
 name = demoiselle
-depends = mobkit,default,biofuel,airutils
+depends = default,biofuel,airutils
 author = APercy
 description = Adds a Demoiselle, an historical airplane
 title = Demoiselle