diff --git a/go.mod b/go.mod
index be14bee..2af5d4d 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 	github.com/go-images/jpeg v0.3.0
 	github.com/go-images/jpeg2000 v0.14.0
 	github.com/go-opentype/fonts v0.14.0
-	github.com/go-opentype/opentype v0.18.0
+	github.com/go-opentype/opentype v0.21.1
 	github.com/go-pdfkit/pdffont v0.4.0
 	github.com/go-pdfkit/reader v0.10.0
 )
diff --git a/go.sum b/go.sum
index 2668348..8228b90 100644
--- a/go.sum
+++ b/go.sum
@@ -11,8 +11,8 @@ github.com/go-images/jpeg2000 v0.14.0 h1:/nH3l5r95E7OkNZCfq7gmoDQvJzVAhmSw6rd2If
 github.com/go-images/jpeg2000 v0.14.0/go.mod h1:4/Pp3Jp2es5lA8/Ema8F7dFwl0vZprCj9MyznIz9Gdc=
 github.com/go-opentype/fonts v0.14.0 h1:WHw7k9gkHT1pu9B2yyvd0FWyQqn/4NKFQoKhvMYt3Mo=
 github.com/go-opentype/fonts v0.14.0/go.mod h1:od2QcmdpKo7QCqo6Jb16y4GULk+h2Hhfq6x3xfvn62Q=
-github.com/go-opentype/opentype v0.18.0 h1:kxYj8r6on63QwPML6Y41xGrSH7A9ap9tKWioI4yFs9Y=
-github.com/go-opentype/opentype v0.18.0/go.mod h1:cyTZyPcwVFR4MTHnCj7a6tk2tGIB6deakpefu/apDjg=
+github.com/go-opentype/opentype v0.21.1 h1:axfaZjo6acnY9OcFHC/q5gaSqyc/KjuaNJ6Z7UBOJPI=
+github.com/go-opentype/opentype v0.21.1/go.mod h1:cyTZyPcwVFR4MTHnCj7a6tk2tGIB6deakpefu/apDjg=
 github.com/go-pdfkit/pdffont v0.4.0 h1:3CV2HnmUGHiIYuZ5dJWRLKvi7hMHGWS1RjgNYkEZ0Gk=
 github.com/go-pdfkit/pdffont v0.4.0/go.mod h1:l7es3IPbKewQF+sSgPh/bQL18jSewoI0cMjttk7uPlc=
 github.com/go-pdfkit/reader v0.10.0 h1:Wi0GCUADMZFxL9iuVwxuiDhv10nGxbZZjNKJIqtj63E=