diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..921b870
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,5 @@
+module github.com/palantir/stacktrace
+
+go 1.14
+
+require github.com/stretchr/testify v1.5.1
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..331fa69
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,11 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+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/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.5.1 h1:nOGnQDM7FYENwehXlg/kFVnos3rEvtKTjRvOWSzb6H4=
+github.com/stretchr/testify v1.5.1/go.mod h1:5W2xD1RspED5o8YsWQXVCued0rvSQ+mT+I5cxcmMvtA=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/stacktrace.go b/stacktrace.go
index 324c4bc..f1fbd47 100644
--- a/stacktrace.go
+++ b/stacktrace.go
@@ -247,3 +247,8 @@ func (st *stacktrace) ExitCode() int {
 	}
 	return int(st.code)
 }
+
+// Unwrap implements Go 1.13 error unwrapping
+func (st *stacktrace) Unwrap() error {
+	return RootCause(st)
+}
diff --git a/stacktrace_test.go b/stacktrace_test.go
index c1276f2..27c5e09 100644
--- a/stacktrace_test.go
+++ b/stacktrace_test.go
@@ -98,3 +98,9 @@ func TestPropagateNil(t *testing.T) {
 
 	assert.Equal(t, stacktrace.NoCode, stacktrace.GetCode(err))
 }
+
+func TestGo113Unwrap(t *testing.T) {
+	rootCause := errors.New("root cause")
+	err := stacktrace.Propagate(rootCause, "")
+	assert.True(t, errors.Is(err, rootCause))
+}