diff --git a/src/crop/aquacrop.jl b/src/crop/aquacrop.jl
index 1bcbd985b2baed87ea294d28cfb2def2bbac4142..678c50faf501a20361689c2fae7ba1a8ed8dd14f 100644
--- a/src/crop/aquacrop.jl
+++ b/src/crop/aquacrop.jl
@@ -188,8 +188,8 @@ cropname(cs::CropState) = cropname(croptype(cs))
 function cropheight(cs::CropState)
     biomass = get_aquacrop_biomass(cs)
     # TODO: linear model, fixed params
-    a = 20cm
-    b = 18u"cm * ha" / ton
+    a = 5cm
+    b = 6u"cm * ha" / ton
     return a + b * biomass
 end
 cropcover(cs::CropState) = AquaCrop.canopycover(cs.cropstate)