diff --git a/examples/go-api/go.mod b/examples/go-api/go.mod
index 0702a39..1082ff6 100644
--- a/examples/go-api/go.mod
+++ b/examples/go-api/go.mod
@@ -2,8 +2,9 @@ module example.com/certtest
 
 go 1.17
 
+require github.com/tsaarni/certyaml v0.9.0
+
 require (
-	github.com/go-asn1-ber/asn1-ber v1.5.3 // indirect
-	github.com/tsaarni/certyaml v0.6.2 // indirect
+	github.com/go-asn1-ber/asn1-ber v1.5.4 // indirect
 	github.com/tsaarni/x500dn v0.0.0-20210331182804-14283c7f5a16 // indirect
 )
diff --git a/examples/go-api/go.sum b/examples/go-api/go.sum
index 6a682e0..b89070d 100644
--- a/examples/go-api/go.sum
+++ b/examples/go-api/go.sum
@@ -1,14 +1,17 @@
 github.com/cnf/structhash v0.0.0-20201127153200-e1b16c1ebc08/go.mod h1:pCxVEbcm3AMg7ejXyorUXi6HQCzOIBf7zEDVPtw0/U4=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+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/go-asn1-ber/asn1-ber v1.3.1/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
-github.com/go-asn1-ber/asn1-ber v1.5.3 h1:u7utq56RUFiynqUzgVMFDymapcOtQ/MZkh3H4QYkxag=
-github.com/go-asn1-ber/asn1-ber v1.5.3/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
+github.com/go-asn1-ber/asn1-ber v1.5.4 h1:vXT6d/FNDiELJnLb6hGNa309LMsrCoYFvpwHDF0+Y1A=
+github.com/go-asn1-ber/asn1-ber v1.5.4/go.mod h1:hEBeB/ic+5LoWskz+yKT7vGhhPYkProFKoKdwZRWMe0=
+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 v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
-github.com/tsaarni/certyaml v0.6.2 h1:iwmYvqIRfcTVnHui2Oi3EQ5O+GmsTMiUqI3+n7eOaiw=
-github.com/tsaarni/certyaml v0.6.2/go.mod h1:fMHgNcBc7APv85tYQQ5186Qx+OeUDmLbGHZTRI988RM=
+github.com/tsaarni/certyaml v0.9.0 h1:7/LvdyLtgHIyqNOBt+e2Am8vVx0rFt2Vk2MndKxJvQQ=
+github.com/tsaarni/certyaml v0.9.0/go.mod h1:roB034EZo2tTCA6G875Qo6rw3ythNEVr8KGgMbpyhdU=
 github.com/tsaarni/x500dn v0.0.0-20210331182804-14283c7f5a16 h1:pwy6wBo/3nIrPBWOAWKkRi888+dXPd78KSTxEtHFAdo=
 github.com/tsaarni/x500dn v0.0.0-20210331182804-14283c7f5a16/go.mod h1:RquKZ5rERbzqRQDFuh2zsgR1W1FH006YRw2pHIuMzvw=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
@@ -26,4 +29,6 @@ golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8T
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 sigs.k8s.io/yaml v1.3.0/go.mod h1:GeOyir5tyXNByN85N/dRIT9es5UQNerPYEKK56eTBm8=