diff --git a/okh.toml b/okh.toml
index 588d3af..3acbca3 100644
--- a/okh.toml
+++ b/okh.toml
@@ -40,7 +40,7 @@ tsdc = "CNC"
 source = "/hardware/case/PlanktoScope-Case.f3z"
 export = ["/hardware/case/PlanktoScope-Case.dxf"]
 outer-dimension-dim = "mm"
-outer-dimension = "cube(size = [400,150,150])"
+outer-dimension = "cube(size = [350,150,150])"
 
 [[part]]
 name = "PlanktoScope-HAT"