diff --git a/monoloco/eval/generate_kitti.py b/monoloco/eval/generate_kitti.py
index f65021e..5da2843 100644
--- a/monoloco/eval/generate_kitti.py
+++ b/monoloco/eval/generate_kitti.py
@@ -273,5 +273,5 @@ def create_empty_files(dir_out, net):
 
     for i in range(7481):
         name = "0" * (6 - len(str(i))) + str(i) + '.txt'
-        ff = open(os.path.join(dir_out[net], name), "a+")
-        ff.close()
+        with open(os.path.join(dir_out[net], name), "a+"):
+            pass
diff --git a/monoloco/utils/kitti.py b/monoloco/utils/kitti.py
index a306ff1..5192500 100644
--- a/monoloco/utils/kitti.py
+++ b/monoloco/utils/kitti.py
@@ -161,8 +161,8 @@ def read_and_rewrite(path_orig, path_new):
                     line_new = temp_1 + ' ' + hwl + ' ' + temp_2 + '\n'
                     ff.write("%s" % line_new)
     except FileNotFoundError:
-        ff = open(path_new, "a+")
-        ff.close()
+        with open(path_new, "a+"):
+            pass
 
 
 def find_cluster(dd, clusters):