diff --git a/requirements.txt b/requirements.txt
index 3ae8b803..53ea9bbb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-ufoLib==2.1.1
-defcon==0.3.5
-fontMath==0.4.4
+ufoLib==2.3.1
+defcon==0.5.2
+fontMath==0.4.5