diff --git a/app/src/main/java/sudoku/solver/HumanSolver.java b/app/src/main/java/sudoku/solver/HumanSolver.java
index 01d2481..fce286c 100644
--- a/app/src/main/java/sudoku/solver/HumanSolver.java
+++ b/app/src/main/java/sudoku/solver/HumanSolver.java
@@ -1,7 +1,6 @@
 package sudoku.solver;
 
 import java.util.List;
-import java.util.concurrent.CancellationException;
 
 import sudoku.structure.Cell;
 import sudoku.structure.MultiDoku;