diff --git a/prepro/requirements.txt b/prepro/requirements.txt
old mode 100755
new mode 100644
index adc1d46..4468a30
--- a/prepro/requirements.txt
+++ b/prepro/requirements.txt
@@ -47,7 +47,7 @@ Markdown==3.0.1
 MarkupSafe==1.0
 matplotlib==3.0.1
 nltk==3.3
-numpy==1.15.2
+numpy==1.22.0
 oauth==1.0.1
 olefile==0.45.1
 pandas==0.23.4