diff --git a/constraints-briefcase.txt b/constraints-briefcase.txt
index 9876040..b3dde88 100644
--- a/constraints-briefcase.txt
+++ b/constraints-briefcase.txt
@@ -12,7 +12,7 @@ cycler==0.12.1
     # via matplotlib
 docx2pdf==0.1.8
     # via dbs-annotator
-fonttools==4.62.1
+fonttools==4.63.0
     # via matplotlib
 kiwisolver==1.5.0
     # via matplotlib