diff --git a/requirements.txt b/requirements.txt
index 6f70d8b..7ee818c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
-numpy==1.16.3
+numpy==1.22.0
 tensorflow==1.13.1
 matplotlib==2.2.4
diff --git a/setup.py b/setup.py
index 0bd6166..8bf3fe8 100644
--- a/setup.py
+++ b/setup.py
@@ -14,7 +14,7 @@
     url="https://github.com/fzyukio/multidimensional-variable-length-seq2seq-autoencoder",
     packages=setuptools.find_packages(),
     license='MIT',
-    install_requires=['numpy==1.16.3', 'tensorflow==1.13.1'],
+    install_requires=['numpy==1.22.0', 'tensorflow==1.13.1'],
     classifiers=[
         "Programming Language :: Python",
         "License :: OSI Approved :: MIT License",