diff --git a/requirements.txt b/requirements.txt
index 33c1b1be..1e1f29b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,9 +6,9 @@ fontMath==0.9.4
 booleanOperations==0.9.0
 ufoLib2==0.16.0
 cffsubr==0.3.0
-compreffor==0.5.5
+compreffor==0.5.6
 ttfautohint-py==0.5.1
 
 # optional, for experimental reading/writing ufoLib2's UFO as json
 cattrs==24.1.2
-orjson==3.10.7; platform_python_implementation == 'CPython'
+orjson==3.10.9; platform_python_implementation == 'CPython'