diff --git a/prototypes/fission/fi_robo.lua b/prototypes/fission/fi_robo.lua
index b4db9d7..5bef01b 100644
--- a/prototypes/fission/fi_robo.lua
+++ b/prototypes/fission/fi_robo.lua
@@ -43,7 +43,7 @@ data:extend({
         flags = {"player-creation","placeable-neutral"},
         max_health = 300,
         corpse = 'big-remnants',
-        collision_box = {{-1.3,-1.3},{1.3,1.3}},
+        collision_box = {{-1.2,-1.2},{1.2,1.2}},
         selection_box = {{-1.5,-1.5},{1.5,1.5}},
         map_color = {r=0, g=0, b=1, a=1},
         minable = {
@@ -134,7 +134,7 @@ data:extend({
         flags = {"player-creation","placeable-neutral"},
         max_health = 300,
         corpse = 'big-remnants',
-        collision_box = {{-1.3,-1.3},{1.3,1.3}},
+        collision_box = {{-1.2,-1.2},{1.2,1.2}},
         selection_box = {{-1.5,-1.5},{1.5,1.5}},
         map_color = {r=0, g=0, b=1, a=1},
         minable = {