diff --git a/requirements.txt b/requirements.txt
index 0a18575..31d34dd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
 -e git+https://github.com/eunchan1001/mphyspy.git@3912a8a31ea52d17bc1362842928684bc9a01c4e#egg=mphyspy
 mpmath==1.1.0
-numpy==1.18.2
+numpy==1.22.0
 sympy==1.5.1