diff --git a/src/utils/simplex.ts b/src/utils/simplex.ts
index 161a699..d3ffb9c 100644
--- a/src/utils/simplex.ts
+++ b/src/utils/simplex.ts
@@ -157,7 +157,7 @@ function ApplyMainLoop(oldMatrix: number[][], rowlength: number): number[][] {
     const pivotRowIndex = ratios.indexOf(minRatio); // i
 
     /// Init the new matrix
-    const newMatrix = structuredClone(matrix);
+    const newMatrix: number[][] = structuredClone(matrix);
     const pivot = matrix[pivotRowIndex][pivotColIndex];
 
     // 3) apply on the pivot row the inverse of the pivot