diff --git a/solver/__init__.py b/solver/__init__.py
index 38c7648..a055568 100644
--- a/solver/__init__.py
+++ b/solver/__init__.py
@@ -32,3 +32,5 @@
 Author: Yu-Chueh Wang
 Version: 1.7.0
 """
+
+from solver.solver import DigitSolver