diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..3b8434a
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module github.com/tidwall/rtree
+
+go 1.15
+
+require github.com/tidwall/tinyqueue v0.1.1
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..0fbfb4d
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+github.com/tidwall/tinyqueue v0.1.1 h1:SpNEvEggbpyN5DIReaJ2/1ndroY8iyEGxPYxoSaymYE=
+github.com/tidwall/tinyqueue v0.1.1/go.mod h1:O/QNHwrnjqr6IHItYrzoHAKYhBkLI67Q096fQP5zMYw=