diff --git a/main.go b/main.go
index 6db2f94..f1afca0 100644
--- a/main.go
+++ b/main.go
@@ -27,13 +27,13 @@ var verbose = flag.Bool("verbose", false, "run verbosly")
 
 type infos struct {
 	id            string
-	width, height float64
+	width, height float32
 }
 
 type Stats struct {
 	Hp            int     `json:"hp"`
-	Speed         float64 `json:"speed"`
-	Acceleration  float64 `json:"acceleration"`
+	Speed         float32 `json:"speed"`
+	Acceleration  float32 `json:"acceleration"`
 	WeaponRadius  int     `json:"weapon_radius"`
 	ScannerRadius int     `json:"scanner_radius"`
 	FireRate      int     `json:"fire_rate"`
@@ -48,8 +48,8 @@ type Robot struct {
 	Id          string            `json:"id"`
 	Name        string            `json:"name"`
 	Stats       Stats             `json:"stats"`
-	TargetSpeed float64           `json:"speed"`
-	Speed       float64           `json:"speed"`
+	TargetSpeed float32           `json:"speed"`
+	Speed       float32           `json:"speed"`
 	Health      int               `json:"health"`
 	Position    govector.Point2d  `json:"position"`
 	Heading     govector.Vector2d `json:"heading"`
@@ -63,7 +63,7 @@ type Projectile struct {
 	Position govector.Point2d `json:"position"`
 	MoveTo   govector.Point2d `json:"move_to"`
 	Radius   int              `json:"radius"`
-	Speed    float64          `json:"speed"`
+	Speed    float32          `json:"speed"`
 	Damage   int              `json:"damage"`
 }
 
@@ -140,8 +140,8 @@ func negociate(ws *websocket.Conn, gameid string) (i *infos, err error) {
 	}
 
 	type BoardSize struct {
-		Width  float64 `json:"width"`
-		Height float64 `json:"height"`
+		Width  float32 `json:"width"`
+		Height float32 `json:"height"`
 	}
 	var gameparam struct {
 		BoardSize BoardSize `json:"boardsize"`
@@ -165,8 +165,8 @@ func negociate(ws *websocket.Conn, gameid string) (i *infos, err error) {
 		Name: *botname,
 		Stats: Stats{
 			Hp:            *hp,
-			Speed:         *speed,
-			Acceleration:  *acceleration,
+			Speed:         float32(*speed),
+			Acceleration:  float32(*acceleration),
 			WeaponRadius:  *weaponRadius,
 			ScannerRadius: *scannerRadius,
 			FireRate:      *fireRate,
@@ -215,8 +215,8 @@ func main() {
 
 	// TODO: var target govector.Point2d
 	moveto := govector.Point2d{
-		X: rand.Float64() * board_info.width,
-		Y: rand.Float64() * board_info.height,
+		X: rand.Float32() * board_info.width,
+		Y: rand.Float32() * board_info.height,
 	}
 	log.Printf("%+v", moveto)
 
@@ -248,8 +248,8 @@ func main() {
 		if govector.Distance(me.Position, moveto) < 3.0 {
 			log.Printf("old: %+v: %+v", me.Position, moveto)
 			moveto = govector.Point2d{
-				X: rand.Float64() * board_info.width,
-				Y: rand.Float64() * board_info.height,
+				X: rand.Float32() * board_info.width,
+				Y: rand.Float32() * board_info.height,
 			}
 			log.Printf("new: %+v: %+v", me.Position, moveto)
 		}