diff --git a/frappy_psi/thermofisher.py b/frappy_psi/thermofisher.py
index f160e06..4a4a9f7 100644
--- a/frappy_psi/thermofisher.py
+++ b/frappy_psi/thermofisher.py
@@ -21,7 +21,7 @@
 
 from frappy.core import Command, StringIO, Parameter, HasIO, \
     Drivable, FloatRange, IDLE, BUSY, ERROR, WARN, BoolType
-from frappy.structparam import StructParam
+from frappy.extparams import StructParam
 from frappy_psi.convergence import HasConvergence