diff --git a/Hungarian.cpp b/Hungarian.cpp
index deb4f71..9ee447c 100644
--- a/Hungarian.cpp
+++ b/Hungarian.cpp
@@ -24,8 +24,8 @@ HungarianAlgorithm::~HungarianAlgorithm(){}
 //********************************************************//
 double HungarianAlgorithm::Solve(vector <vector<double> >& DistMatrix, vector<int>& Assignment)
 {
-	unsigned int nRows = DistMatrix.size();
-	unsigned int nCols = DistMatrix[0].size();
+	const unsigned int nRows = static_cast<unsigned int>(DistMatrix.size());
+	const unsigned int nCols = static_cast<unsigned int>(DistMatrix[0].size());
 
 	double *distMatrixIn = new double[nRows * nCols];
 	int *assignment = new int[nRows];