diff --git a/go.mod b/go.mod
index d27c2a9..e217f26 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@ go 1.26.4
 
 require (
 	github.com/go-opentype/fonts v0.10.0
-	github.com/go-opentype/opentype v0.12.0
+	github.com/go-opentype/opentype v0.13.0
 	github.com/go-pdfkit/pdffont v0.3.1
 	github.com/go-pdfkit/reader v0.6.0
 )
diff --git a/go.sum b/go.sum
index ff75b96..e895280 100644
--- a/go.sum
+++ b/go.sum
@@ -1,7 +1,7 @@
 github.com/go-opentype/fonts v0.10.0 h1:9f7ik795SlBEJjz6iqBE/ZV2PaTauAj537MMWw9t4OQ=
 github.com/go-opentype/fonts v0.10.0/go.mod h1:b+o8v1zDZ6B3GixA398jGILAh09+WwfyoYz52zKe7DA=
-github.com/go-opentype/opentype v0.12.0 h1:wBlcDi+3ZaNZXEt5z+Ixr11/cYYwi5W+jX6yTl/qr1I=
-github.com/go-opentype/opentype v0.12.0/go.mod h1:AOixevJf7XQaH7+WG+OMIOZEbYPXfMqklVk26Y6YTUU=
+github.com/go-opentype/opentype v0.13.0 h1:q9K7IGDfwMP/ik51ZkwiYf6jbaqPfocvAIuojetd0UQ=
+github.com/go-opentype/opentype v0.13.0/go.mod h1:AOixevJf7XQaH7+WG+OMIOZEbYPXfMqklVk26Y6YTUU=
 github.com/go-pdfkit/pdffont v0.3.1 h1:+K7opHGRERDZ5EMkA12s1GT48t8GpncArhnyzyc5bxU=
 github.com/go-pdfkit/pdffont v0.3.1/go.mod h1:eFJ/7t9AvcX76KY5qNJMMKetz8hUUUdVM1qSWLi3S1g=
 github.com/go-pdfkit/reader v0.6.0 h1:KAabNOYUcTlZlNBTbG9bEhWP1NiZhjuhzUdavdTdfes=