diff --git a/code-env/python/spec/requirements.txt b/code-env/python/spec/requirements.txt
old mode 100755
new mode 100644
index 28c48f7..dcd801f
--- a/code-env/python/spec/requirements.txt
+++ b/code-env/python/spec/requirements.txt
@@ -1,5 +1,5 @@
 nltk==3.4.5; python_version < '3.8'
-nltk==3.8.1; python_version >= '3.8'
+nltk==3.9; python_version >= '3.8'
 sumy==0.8.1; python_version < '3.8'
 sumy==0.11.0; python_version >= '3.8'
 pycountry==19.8.18