diff --git a/requirements.txt b/requirements.txt
index 4022d125a1..c8a6ff0dab 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,5 @@
 # generated from manifests external_dependencies
-factur-x
+factur-x<=3.1
 invoice2data==0.3.5
 ovh
 phonenumbers