diff --git a/requirements.txt b/requirements.txt
index d1f9a9d..5da5aaf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,4 @@
-Flask==1.0
+Flask==2.3.2
 dkimpy==0.8.1
 email-reply-parser==0.5.12
 flanker==0.4.38