diff --git a/3_unsupervised/requirement.txt b/3_unsupervised/requirement.txt
index 43aa6b6..b911d76 100644
--- a/3_unsupervised/requirement.txt
+++ b/3_unsupervised/requirement.txt
@@ -1,5 +1,5 @@
 pandas==0.23.4
-numpy==1.15.4
+numpy==1.22.0
 matplotlib==3.0.0
 sklearn==0.20.0
 scipy==1.1.0