diff --git a/.rustfmt.toml b/.rustfmt.toml
new file mode 100644
index 0000000..cd427e2
--- /dev/null
+++ b/.rustfmt.toml
@@ -0,0 +1,5 @@
+# SPDX-FileCopyrightText: 2024 Christina Sørensen
+#
+# SPDX-License-Identifier: EUPL-1.2
+
+tab_spaces = 2