Windows 10 1809 version has got KB4505657 as a Dynamic or Compatibility update. Today released patch will improve the installation experience for October 2018 edition. You will automatically receive the update, however, you can download manually install the same from the following links –
x86 – windows10.0-kb4505657-x86 – 6.53MB
x64 – windows10.0-kb4505657 – 7.70MB
ARM64 – windows10.0-kb4505657 – 6.72MB
Source – Release note.