diff --git a/tcl/calib.stick b/tcl/calib.stick
index fed6afd..c4dc8bb 100644
--- a/tcl/calib.stick
+++ b/tcl/calib.stick
@@ -31,4 +31,4 @@ calib tlist 1.38 1.42 1.51 logstep0.04 288 302 310
 # timing is such that 2 * 24h are not enough
 # try with a little more precision (expecially at hi T)
 
-calib slopelimit 0.002
+calib slopelimit 0.005