diff --git a/src/openqlab/analysis/__init__.py b/src/openqlab/analysis/__init__.py
index bc6d9d728a15090391efa43c2bc2e00023010245..80354e0181edd48412e3e33e750a475f6371463f 100644
--- a/src/openqlab/analysis/__init__.py
+++ b/src/openqlab/analysis/__init__.py
@@ -1,4 +1,4 @@
 from .servo_design import ServoDesign
 from .gaussian_beam import fit_beam_data, GaussianBeam
 from ..conversion import db
-from . import phase
+from . import phase, cavity