diff --git a/.gitignore b/.gitignore
index 93e63d7..d5e123b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -107,4 +107,4 @@ dist
 public/
 
 submodules/*
-!submodules/.gitkeep
+!submodules/update.sh
diff --git a/submodules/.gitkeep b/submodules/.gitkeep
deleted file mode 100644
index 217e56b..0000000
--- a/submodules/.gitkeep
+++ /dev/null
@@ -1,12 +0,0 @@
-# This `submodules` directory exists to hold external projects, but without using
-# Git's submodule functionality (because they're kind of a pain in the ass to use).
-
-# To initialize the submodules needed to build the website, run the following
-# commands in this directory.
-
-git clone git@git.holllo.cc/Bauke/userstyles.git
-cd userstyles
-yarn --silent
-
-# Then, if they ever need to be updated, just pull the changes and run Yarn
-# again, if necessary.
diff --git a/submodules/update.sh b/submodules/update.sh
new file mode 100755
index 0000000..3f35e00
--- /dev/null
+++ b/submodules/update.sh
@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+set -e
+
+# This `submodules` directory exists to hold external projects, but without using
+# Git's submodule functionality (because they're kind of a pain in the ass to use).
+
+# To initialize the submodules needed to build the website, just execute
+# this file from the directory it's in with `./update.sh`.
+# Then, if they ever need to be updated, just execute this file again.
+
+update() {
+  repo=$1
+  directory=$2
+
+  echo "[$directory] $repo"
+
+  if [ -d "$directory" ]; then
+    echo "[$directory] Pulling Git commits."
+    cd $directory
+    git pull
+  else
+    echo "[$directory] Cloning Git repository."
+    git clone $repo $directory
+    cd $directory
+  fi
+
+  echo "[$directory] Installing Yarn dependencies."
+  yarn --silent
+  cd ..
+
+  echo
+}
+
+update "git@git.holllo.cc:Bauke/userscripts.git" "userscripts"
+update "git@git.holllo.cc:Bauke/userstyles.git" "userstyles"
+
+echo "All done!"