diff --git a/concurrency_vs_parallelism/requirements.txt b/concurrency_vs_parallelism/requirements.txt
index 32f6a37..778bb63 100644
--- a/concurrency_vs_parallelism/requirements.txt
+++ b/concurrency_vs_parallelism/requirements.txt
@@ -1,7 +1,7 @@
 aiofiles==0.3.1
 aiohttp==2.2.5
 async-timeout==1.4.0
-certifi==2017.7.27.1
+certifi==2022.12.7
 chardet==3.0.4
 idna==2.6
 multidict==3.2.0