diff --git a/src/pip/_vendor/vendor.txt b/src/pip/_vendor/vendor.txt
index 21614a5e61c..cc8157f1697 100644
--- a/src/pip/_vendor/vendor.txt
+++ b/src/pip/_vendor/vendor.txt
@@ -12,7 +12,7 @@ pep517==0.9.1
 progress==1.5
 pyparsing==2.4.7
 requests==2.25.0
-    certifi==2020.11.8
+    certifi==2020.11.08
     chardet==3.0.4
     idna==2.10
     urllib3==1.26.2