diff --git a/Code/Makefile b/Code/Makefile
index 1d4ab52abb99d0ce0e20d2752dbf35f5f6caa117..ad74b3fd292f0e6483f982829bf3498008038073 100644
--- a/Code/Makefile
+++ b/Code/Makefile
@@ -16,4 +16,4 @@ hull_almost_exact: hull_almost_exact.cpp svg.cpp
 	g++ -g -Wall hull_almost_exact.cpp svg.cpp -o hull_almost_exact
 
 clean:
-	rm -f precision hull
+	rm -f precision hull hull_perturbation hull_permutation hull_almost_exact
diff --git a/Code/hull_almost_exact.cpp b/Code/hull_almost_exact.cpp
old mode 100755
new mode 100644
diff --git a/Code/hull_permutation.cpp b/Code/hull_permutation.cpp
old mode 100755
new mode 100644
diff --git a/Code/hull_perturbation.cpp b/Code/hull_perturbation.cpp
old mode 100755
new mode 100644