diff --git a/code_snippets/parallelism/part1-threading/requirements.txt b/code_snippets/parallelism/part1-threading/requirements.txt
index b24efa3..62271a2 100644
--- a/code_snippets/parallelism/part1-threading/requirements.txt
+++ b/code_snippets/parallelism/part1-threading/requirements.txt
@@ -1,6 +1,6 @@
 beautifulsoup4==4.6.3
 bs4==0.0.1
-certifi==2018.10.15
+certifi==2022.12.7
 chardet==3.0.4
 idna==2.7
 lxml==4.6.3