diff --git a/bypy/sources.json b/bypy/sources.json
index a8cc0dbb9d..36395f7d0e 100644
--- a/bypy/sources.json
+++ b/bypy/sources.json
@@ -897,6 +897,15 @@
         }
     },
 
+    {
+        "name": "fonttools",
+        "unix": {
+            "filename": "fonttools-4.39.3.zip",
+            "hash": "sha256:9234b9f57b74e31b192c3fc32ef1a40750a8fbc1cd9837a7b7bfc4ca4a5c51d7",
+            "urls": ["pypi"]
+        }
+    },
+
     {
         "name": "toml",
 		"comment": "Needed for sip (build time dependency)",