diff --git a/dev/list-outdated.sh b/dev/list-outdated.sh
new file mode 100755
index 0000000..9e50a79
--- /dev/null
+++ b/dev/list-outdated.sh
@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+#
+# $@: optionally provided crates to check for
+
+check_command() {
+    if [[ "$(command -v $@ | wc -l)" -ne $# ]]; then
+        echo This script needs $@ to work.
+        exit 1
+    fi
+}
+
+check_command curl jq
+
+pushd src >/dev/null
+
+NAMES=*
+if [ $# -ne 0 ]; then
+    NAMES=$@
+fi
+
+echo -e "crate\tpackaged\tcrates.io"
+for name in $NAMES; do
+    if [ ! -e $name/debian/changelog ]; then
+        continue
+    fi
+    curver=$(head -n1 $name/debian/changelog | tr -d '()' | awk '{print $2}' | awk -F- '{print $1}')
+    latestver=$(curl -sSL https://crates.io/api/v1/crates/$name | jq .versions[0].num | tr -d '"')
+    if [ "$curver" != "$latestver" ]; then
+        echo -e "$name\t$curver\t$latestver"
+    fi
+done
+
+popd >/dev/null