diff --git a/brainpy/dyn.py b/brainpy/dyn.py
index 407631559..468f3bd17 100644
--- a/brainpy/dyn.py
+++ b/brainpy/dyn.py
@@ -4,7 +4,7 @@
 Deprecated. Use ``brainpy.xxx`` instead.
 """
 
-
+from . import neurons, synouts, synapses, synplast, layers, rates