diff --git a/setup.py b/setup.py
index 409f284..ce9b552 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@
     platforms="any",
     install_requires=[
         "aiocontextvars==0.2.2; python_version < '3.7'",
-        "certifi==2020.6.20",
+        "certifi==2021.5.30",
         "chardet==3.0.4",
         "contextvars==2.4; python_version < '3.7'",
         "docopt==0.6.2",