diff --git a/swash/processing/sws_npz.py b/swash/processing/sws_npz.py
index 4768472..dc10174 100644
--- a/swash/processing/sws_npz.py
+++ b/swash/processing/sws_npz.py
@@ -32,6 +32,4 @@ botl = read_nohead_scalar(sws_out.joinpath("botl.dat"), n_x)
 dep = np.maximum(0, read_nohead_scalar(sws_out.joinpath("dep.dat"), n_x))
 vel = read_nohead_vect(sws_out.joinpath("vel.dat"), n_x)
 
-botl.savez_compressed(inp.joinpath("botl"))
-dep.savez_compressed(inp.joinpath("dep"))
-vel.savez_compressed(inp.joinpath("vel"))
+np.savez_compressed(inp.joinpath("sws"), botl=botl, dep=dep, vel=vel)