diff --git a/src/pip/_vendor/vendor.txt b/src/pip/_vendor/vendor.txt
index c2f81d7f0..1ec29804f 100644
--- a/src/pip/_vendor/vendor.txt
+++ b/src/pip/_vendor/vendor.txt
@@ -11,7 +11,7 @@ pep517==0.9.1
 progress==1.5
 pyparsing==2.4.7
 requests==2.25.1
-    certifi==2020.12.5
+    certifi==2020.12.05
     chardet==4.0.0
     idna==2.10
     urllib3==1.26.2