diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..cb47297
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
+github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=