diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..acf119e
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,11 @@
+module github.com/kevinburke/nacl
+
+go 1.20
+
+require (
+	filippo.io/edwards25519 v1.1.0
+	github.com/google/go-cmp v0.6.0
+	golang.org/x/crypto v0.25.0
+)
+
+require golang.org/x/sys v0.22.0 // indirect
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..bd0b944
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,8 @@
+filippo.io/edwards25519 v1.1.0 h1:FNf4tywRC1HmFuKW5xopWpigGjJKiJSV0Cqo0cJWDaA=
+filippo.io/edwards25519 v1.1.0/go.mod h1:BxyFTGdWcka3PhytdK4V28tE5sGfRvvvRV7EaN4VDT4=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+golang.org/x/crypto v0.25.0 h1:ypSNr+bnYL2YhwoMt2zPxHFmbAN1KZs/njMG3hxUp30=
+golang.org/x/crypto v0.25.0/go.mod h1:T+wALwcMOSE0kXgUAnPAHqTLW+XHgcELELW8VaDgm/M=
+golang.org/x/sys v0.22.0 h1:RI27ohtqKCnwULzJLqkv897zojh5/DwS/ENaMzUOaWI=
+golang.org/x/sys v0.22.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=