diff --git a/.spi.yml b/.spi.yml
new file mode 100644
index 0000000..f06db42
--- /dev/null
+++ b/.spi.yml
@@ -0,0 +1,3 @@
+version: 1
+external_links:
+  documentation: "https://attaswift.github.io/BigInt/documentation/bigint/"