diff --git a/Pilz.Updating.Client/Utils.cs b/Pilz.Updating.Client/Utils.cs
index 219d0ab..61e7cc6 100644
--- a/Pilz.Updating.Client/Utils.cs
+++ b/Pilz.Updating.Client/Utils.cs
@@ -42,6 +42,7 @@ public static class Utils
                     oldFile = destFileName + ".old";
                     File.Move(destFileName, oldFile, true);
                     triesLeft++;
+                    Thread.Sleep(1000);
                 }
             }
             catch (Exception)
@@ -54,6 +55,7 @@ public static class Utils
             try
             {
                 File.Delete(oldFile);
+                Thread.Sleep(1000);
             }
             catch (Exception)
             {