update requirements.txt

arrowtype · arrowtype · commit 9a3ad9be9e32 · 2023-04-11T11:16:47.000-04:00
diff --git a/requirements.txt b/requirements.txt
@@ -1,5 +1,5 @@
 # to enable all sorts of font manipulation
-fonttools==4.17.0
+fonttools==4.39.3
 
 # to check font versions in the build-all shell script
 font-v==1.0.5
