diff --git a/pkg/reloader/reloader.go b/pkg/reloader/reloader.go
index 68c9d1709d..e666590451 100644
--- a/pkg/reloader/reloader.go
+++ b/pkg/reloader/reloader.go
@@ -199,9 +199,16 @@ func (r *Reloader) apply(ctx context.Context) error {
 				return errors.Wrap(err, "expand environment variables")
 			}
 
-			if err := ioutil.WriteFile(r.cfgOutputFile, b, 0666); err != nil {
+			tmpFile := r.cfgOutputFile + ".tmp"
+			defer func() {
+				_ = os.Remove(tmpFile)
+			}()
+			if err := ioutil.WriteFile(tmpFile, b, 0666); err != nil {
 				return errors.Wrap(err, "write file")
 			}
+			if err := os.Rename(tmpFile, r.cfgOutputFile); err != nil {
+				return errors.Wrap(err, "rename file")
+			}
 		}
 	}