diff --git a/requirements.txt b/requirements.txt
index ee24ee8..871c597 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,12 +4,12 @@ certifi==2021.5.30
 chainer==7.8.0
 chardet==4.0.0
 coverage==5.5
-coveralls==3.1.0
+coveralls==3.3.1
 docopt==0.6.2
 entrypoints==0.3
 filelock==3.4.2
 flake8==3.9.2
-idna==3.2
+idna==3.3
 importlib-metadata==4.8.1
 mccabe==0.6.1
 more-itertools==8.9.0
@@ -22,7 +22,7 @@ pycodestyle==2.7.0
 pyflakes==2.3.1
 pyparsing==2.4.7
 pytest==6.2.5
-pytest-cov==2.12.1
+pytest-cov==3.0.0
 requests==2.25.1
 six==1.16.0
 typing==3.7.4.3