diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..5df2f55
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module github.com/anderspitman/boringproxy
+
+go 1.15
+
+require github.com/caddyserver/certmagic v0.12.0
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..5f69ac6
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,66 @@
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