diff --git a/requirements.txt b/requirements.txt
index 9d3e97af..bece3457 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ blackrenderer==0.6.0
 fonttools[unicode,ufo,lxml,type1,woff]==4.51.0
 # Temporarily add support for experimental extensions to the not-yet-official COLRv1 format:
 # fonttools[woff,ufo,type1,unicode,lxml] @ git+https://github.com/justvanrossum/fonttools@colrv1-varco
-uharfbuzz==0.37.0
+uharfbuzz==0.39.1
 python-bidi==0.4.2
 jundo==0.1.2
 ufo2ft==2.30.0