diff --git a/README.md b/README.md
index 3d158d8..24dc3af 100644
--- a/README.md
+++ b/README.md
@@ -232,7 +232,8 @@
 
 ### `mappings/stts-upos.yaml`
 
-Mapping between STTS and UD part-of-spech tags.
+Mapping between [STTS and UD part-of-spech tags](https://universaldependencies.org/tagset-conversion/de-stts-uposf.html).
+
 
 ## Progress
 
diff --git a/go.mod b/go.mod
index 4dd3711..e9e50c4 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,8 @@
 require (
 	github.com/alecthomas/kong v1.11.0
 	github.com/alecthomas/participle/v2 v2.1.4
-	github.com/gofiber/fiber/v2 v2.52.8
+	github.com/gofiber/fiber/v2 v2.52.9
+	github.com/orisano/gosax v1.1.2
 	github.com/rs/zerolog v1.34.0
 	github.com/stretchr/testify v1.10.0
 	gopkg.in/yaml.v3 v3.0.1
@@ -21,7 +22,6 @@
 	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/mattn/go-runewidth v0.0.16 // indirect
-	github.com/orisano/gosax v1.1.2 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
 	github.com/rivo/uniseg v0.4.7 // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
diff --git a/go.sum b/go.sum
index 91fdbb9..85a1d78 100644
--- a/go.sum
+++ b/go.sum
@@ -12,8 +12,8 @@
 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/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
-github.com/gofiber/fiber/v2 v2.52.8 h1:xl4jJQ0BV5EJTA2aWiKw/VddRpHrKeZLF0QPUxqn0x4=
-github.com/gofiber/fiber/v2 v2.52.8/go.mod h1:YEcBbO/FB+5M1IZNBP9FO3J9281zgPAreiI1oqg8nDw=
+github.com/gofiber/fiber/v2 v2.52.9 h1:YjKl5DOiyP3j0mO61u3NTmK7or8GzzWzCFzkboyP5cw=
+github.com/gofiber/fiber/v2 v2.52.9/go.mod h1:YEcBbO/FB+5M1IZNBP9FO3J9281zgPAreiI1oqg8nDw=
 github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
 github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
 github.com/hexops/gotextdiff v1.0.3 h1:gitA9+qJrrTCsiCl7+kh75nPqQt1cx4ZkudSTLoUqJM=