diff --git a/external/update_submodules.sh b/external/update_submodules.sh
new file mode 100755
index 0000000..610f1d0
--- /dev/null
+++ b/external/update_submodules.sh
@@ -0,0 +1,13 @@
+#! /usr/bin/env bash
+
+for dir in * ; do
+    dir=${dir%*/}
+    if [ -d "${dir}" ]; then
+      echo "${dir}"
+      cd "${dir}"
+      latest_commit_with_tag=`git rev-list --tags --max-count=1`
+      latest_tag=`git describe --tags ${latest_commit_with_tag}`
+      git checkout "${latest_tag}"
+      cd ..
+    fi
+done