diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..24a8e87
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1 @@
+*.png filter=lfs diff=lfs merge=lfs -text
diff --git a/generate.sh b/generate.sh
new file mode 100755
index 0000000..40d0e62
--- /dev/null
+++ b/generate.sh
@@ -0,0 +1,6 @@
+#!/usr/bin/env nix-shell
+#!nix-shell -i bash -p imagemagick
+
+DIR=$(dirname -- "$(readlink -f -- "$0")")
+
+magick "$DIR/source.svg" "$DIR/export.png"
diff --git a/pre-commit b/pre-commit
new file mode 100755
index 0000000..8a18c4a
--- /dev/null
+++ b/pre-commit
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+
+./generate.sh
+
+if [ $? -ne 0 ]; then
+  echo "generate.sh failed. Commit aborted."
+  exit 1
+fi
diff --git a/bookmark.svg b/source.svg
similarity index 100%
rename from bookmark.svg
rename to source.svg