diff --git a/requirements.txt b/requirements.txt
index c8752ce..254da34 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,6 +12,7 @@ pdfplumber==0.11.5
 pdfminer.six==20231228
 Pillow==10.2.0
 PyYAML==6.0.2
+pyahocorasick>=2.1.0,<3
 
 # (optionnel – uniquement si tu utilises la voie PyTorch ailleurs)
 # torch==2.3.1