diff --git a/README.md b/README.md
index 12d4b789..bc5bfcb6 100644
--- a/README.md
+++ b/README.md
@@ -362,6 +362,7 @@ Support this project with a :star:
 |      dir\_names\_include\_files\_separator       | string |  false   |          `"\n"`           |                                                                                                       Separator used to split the <br>`dir_names_include_files` input                                                                                                        |
 |             dir\_names\_max\_depth              | string |  false   |                           |                                                                        Limit the directory output to <br>a maximum depth e.g `test/test1/test2` <br>with max depth of `2` <br>returns `test/test1`.                                                                          |
 |                 escape\_json                  | string |  false   |         `"true"`          |                                                                                                                             Escape JSON output.                                                                                                                              |
+|      fetch\_additional\_submodule\_history      | string |  false   |         `"false"`         |                                                                                                                   Fetch additional history for submodules.                                                                                                                   |
 |                 fetch\_depth                  | string |  false   |          `"50"`           |                                                                     Depth of additional branch history <br>fetched. **NOTE**: This can be <br>adjusted to resolve errors with <br>insufficient history.                                                                      |
 |                    files                     | string |  false   |                           |                                                File and directory patterns used <br>to detect changes (Defaults to the entire repo if unset) **NOTE:** <br>Multiline file/directory patterns should not <br>include quotes.                                                  |
 |            files\_from\_source\_file            | string |  false   |                           |                                                                                                           Source file(s) used to populate <br>the `files` input.                                                                                                             |