diff --git a/18_localization_delaunay/requirements.txt b/18_localization_delaunay/requirements.txt
index fb61b3f..7a27cd1 100644
--- a/18_localization_delaunay/requirements.txt
+++ b/18_localization_delaunay/requirements.txt
@@ -1,4 +1,4 @@
 ipywidgets==5.2.2
 matplotlib==1.5.3
 scipy==0.18.1
-numpy==1.11.1
\ No newline at end of file
+numpy==1.21.0
\ No newline at end of file