diff --git a/go.mod b/go.mod
index 8f09c36..17174ca 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,7 @@ module git.tdem.in/tdemin/gmnhg
 
 go 1.15
 
-require github.com/gomarkdown/markdown v0.0.0-20201024011455-45c732cc8a6b
+require (
+	github.com/davecgh/go-spew v1.1.1
+	github.com/gomarkdown/markdown v0.0.0-20201024011455-45c732cc8a6b
+)
diff --git a/go.sum b/go.sum
index 6b74de0..88392a2 100644
--- a/go.sum
+++ b/go.sum
@@ -1,3 +1,5 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/gomarkdown/markdown v0.0.0-20201024011455-45c732cc8a6b h1:Om9FdD4lzIJELyJxwr9EWSjaG6GMUNS3iebnhrGevhI=
 github.com/gomarkdown/markdown v0.0.0-20201024011455-45c732cc8a6b/go.mod h1:aii0r/K0ZnHv7G0KF7xy1v0A7s2Ljrb5byB7MO5p6TU=
 golang.org/dl v0.0.0-20190829154251-82a15e2f2ead/go.mod h1:IUMfjQLJQd4UTqG1Z90tenwKoCX93Gn3MAQJMOSBsDQ=