diff --git a/R/roxygen2.R b/R/roxygen2.R
index ea9a562..5532f35 100644
--- a/R/roxygen2.R
+++ b/R/roxygen2.R
@@ -4,27 +4,28 @@ git_links <- function() {
   base_url <- "https://libgit2.org/docs/reference/main/%s/index.html"
   dat <- as.data.frame(
     rbind(
-      c("branch",     sprintf(base_url, "branch")),
+      c("branch", sprintf(base_url, "branch")),
       c("cherrypick", sprintf(base_url, "cherrypick")),
-      c("checkout",   sprintf(base_url, "checkout")),
-      c("clone",      sprintf(base_url, "clone")),
-      c("commit",     sprintf(base_url, "commit")),
-      c("config",     sprintf(base_url, "config")),
-      c("diff",       sprintf(base_url, "diff")),
-      c("graph",      sprintf(base_url, "graph")),
-      c("ignore",     sprintf(base_url, "ignore")),
-      c("index",      sprintf(base_url, "index")),
-      c("merge",      sprintf(base_url, "merge")),
-      c("rebase",     sprintf(base_url, "rebase")),
-      c("remote",     sprintf(base_url, "remote")),
+      c("checkout", sprintf(base_url, "checkout")),
+      c("clone", sprintf(base_url, "clone")),
+      c("commit", sprintf(base_url, "commit")),
+      c("config", sprintf(base_url, "config")),
+      c("diff", sprintf(base_url, "diff")),
+      c("graph", sprintf(base_url, "graph")),
+      c("ignore", sprintf(base_url, "ignore")),
+      c("index", sprintf(base_url, "index")),
+      c("merge", sprintf(base_url, "merge")),
+      c("rebase", sprintf(base_url, "rebase")),
+      c("remote", sprintf(base_url, "remote")),
       c("repository", sprintf(base_url, "repository")),
-      c("reset",      sprintf(base_url, "reset")),
-      c("revert",     sprintf(base_url, "revert")),
-      c("signature",  sprintf(base_url, "signature")),
-      c("stash",      sprintf(base_url, "stash")),
-      c("status",     sprintf(base_url, "status")),
-      c("tag",        sprintf(base_url, "tag")),
-      c("worktree",   sprintf(base_url, "worktree"))
+      c("reset", sprintf(base_url, "reset")),
+      c("revert", sprintf(base_url, "revert")),
+      c("signature", sprintf(base_url, "signature")),
+      c("stash", sprintf(base_url, "stash")),
+      c("status", sprintf(base_url, "status")),
+      c("submodule", sprintf(base_url, "submodule")),
+      c("tag", sprintf(base_url, "tag")),
+      c("worktree", sprintf(base_url, "worktree"))
     ),
     stringsAsFactors = FALSE
   )
diff --git a/R/submodules.R b/R/submodules.R
index a1ac53a..cb3b4e5 100644
--- a/R/submodules.R
+++ b/R/submodules.R
@@ -7,6 +7,7 @@
 #' @rdname git_submodule
 #' @inheritParams git_open
 #' @useDynLib gert R_git_submodule_list
+#' @git submodule
 git_submodule_list <- function(repo = '.') {
   repo <- git_open(repo)
   .Call(R_git_submodule_list, repo)
diff --git a/man/git_submodule.Rd b/man/git_submodule.Rd
index 23c84ea..0f43e5e 100644
--- a/man/git_submodule.Rd
+++ b/man/git_submodule.Rd
@@ -46,3 +46,5 @@ versions of gert may have additional parameters.}
 Interact with \href{https://www.git-scm.com/book/en/v2/Git-Tools-Submodules}{submodules}
 in the repository.
 }
+\section{Related libgit2 documentation}{\href{https://libgit2.org/docs/reference/main/submodule/index.html}{\code{submodule}}.}
+