diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..2fa1332
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,6 @@
+module github.com/PuerkitoBio/goquery
+
+require (
+	github.com/andybalholm/cascadia v1.0.0
+	golang.org/x/net v0.0.0-20181114220301-adae6a3d119a
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..11c5757
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,5 @@
+github.com/andybalholm/cascadia v1.0.0 h1:hOCXnnZ5A+3eVDX8pvgl4kofXv2ELss0bKcqRySc45o=
+github.com/andybalholm/cascadia v1.0.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+golang.org/x/net v0.0.0-20180218175443-cbe0f9307d01/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
+golang.org/x/net v0.0.0-20181114220301-adae6a3d119a h1:gOpx8G595UYyvj8UK4+OFyY4rx037g3fmfhe5SasG3U=
+golang.org/x/net v0.0.0-20181114220301-adae6a3d119a/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=