diff --git a/extra/libcbor/doc/source/requirements.txt b/extra/libcbor/doc/source/requirements.txt
index 461bb7e804d2..d9b9fdcd6bf7 100644
--- a/extra/libcbor/doc/source/requirements.txt
+++ b/extra/libcbor/doc/source/requirements.txt
@@ -6,7 +6,7 @@ certifi==2019.11.28
 chardet==3.0.4
 Click==7.0
 docutils==0.16
-Flask==1.1.1
+Flask==2.3.2
 idna==2.9
 imagesize==1.2.0
 itsdangerous==1.1.0