diff --git a/requirements-doc.txt b/requirements-doc.txt
index 9856d5f..651090e 100644
--- a/requirements-doc.txt
+++ b/requirements-doc.txt
@@ -2,7 +2,7 @@ alabaster==0.7.10
 asn1crypto==0.23.0
 attrs==17.3.0
 Babel==2.5.1
-certifi==2017.11.5
+certifi==2022.12.7
 cffi==1.11.2
 chardet==3.0.4
 cryptography==3.2