diff --git a/requirements.txt b/requirements.txt
old mode 100755
new mode 100644
index dcd31aa..ed579f3
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@
 # statswag/metrics/__init__.py: 1
 # statswag/setup.py: 5,26
 # statswag/utils/__init__.py: 1
-numpy == 1.16.4
+numpy == 1.22.0
 
 # statswag/estimators/MLE.py: 9
 # statswag/estimators/iwmv.py: 4