diff --git a/go.mod b/go.mod
index 620b74e..4e1f0d8 100644
--- a/go.mod
+++ b/go.mod
@@ -1 +1,6 @@
 module github.com/russross/blackfriday/v2
+
+require (
+	github.com/pmezard/go-difflib v1.0.0
+	github.com/shurcooL/sanitized_anchor_name v0.0.0-20170918181015-86672fcb3f95
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..41b5e05
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,4 @@
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/shurcooL/sanitized_anchor_name v0.0.0-20170918181015-86672fcb3f95 h1:/vdW8Cb7EXrkqWGufVMES1OH2sU9gKVb2n9/1y5NMBY=
+github.com/shurcooL/sanitized_anchor_name v0.0.0-20170918181015-86672fcb3f95/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=