diff --git a/nlp-tools/requirements.txt b/nlp-tools/requirements.txt
index b3a1549..d71af18 100644
--- a/nlp-tools/requirements.txt
+++ b/nlp-tools/requirements.txt
@@ -1 +1 @@
-git+http://vxgit.intra.inist.fr:60000/git/RichText/NLP_tools.git@1.6#egg=nlptools
+git+http://vxgit.intra.inist.fr:60000/git/RichText/NLP_tools.git@1.6.3#egg=nlptools