diff --git a/requirements.txt b/requirements.txt
index 722211c..ba7c486 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 fonttools==4.51.0
 fontmake==3.9.0
+fontc==0.0.1.post5
 git+https://github.com/googlefonts/fontra.git
 git+https://github.com/googlefonts/fontra-rcjk.git