diff --git a/go.mod b/go.mod
index 3744d6e..d3d26de 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,8 @@
 module github.com/sourcegraph/jsonschemadoc
 
-require github.com/sourcegraph/go-jsonschema v0.0.0-20190205151546-7939fa138765 // indirect
+go 1.14
+
+require (
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/sourcegraph/go-jsonschema v0.0.0-20190205151546-7939fa138765
+)
diff --git a/go.sum b/go.sum
index 282d6ed..560345d 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,4 @@
+github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/sourcegraph/go-jsonschema v0.0.0-20190205151546-7939fa138765 h1:bFHV2WYU7J7MPdKTyaR6M7Ahhbn4cIdvbTRIRXprenM=
 github.com/sourcegraph/go-jsonschema v0.0.0-20190205151546-7939fa138765/go.mod h1:6DfNy4BLIggAeittTJ8o9z/6d1ly+YujBTSnv03i7Bk=