diff --git a/requirements.txt b/requirements.txt
index d209472..d675d55 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@ pint~=0.17
 tabulate~=0.8.9
 path~=15.1.2
 shapely~=1.7.1
-numpy~=1.20.1
+numpy~=1.20.3
 matplotlib~=3.4.2
 pandas~=1.2.4  # because of io.common methods
 sympy==1.5.*  # because of specific expression parsing