diff --git a/go.mod b/go.mod
index 56137e1..52f232d 100644
--- a/go.mod
+++ b/go.mod
@@ -2,4 +2,4 @@ module github.com/go-tex/math
 
 go 1.26.4
 
-require github.com/go-opentype/opentype v0.6.0
+require github.com/go-opentype/opentype v0.12.0
diff --git a/go.sum b/go.sum
index 91cdcf0..81e2220 100644
--- a/go.sum
+++ b/go.sum
@@ -1,2 +1,4 @@
 github.com/go-opentype/opentype v0.6.0 h1:2t1Qs/Uo4M+f9gahV5QGihLTTeI/q4s0l7MIsbkd290=
 github.com/go-opentype/opentype v0.6.0/go.mod h1:AOixevJf7XQaH7+WG+OMIOZEbYPXfMqklVk26Y6YTUU=
+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=