diff --git a/requirements.txt b/requirements.txt
index 43949f7e6a..22b2362d49 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -46,7 +46,7 @@ cryptography==42.0.4
     #   pyopenssl
 defusedxml==0.7.1
     # via privacyIDEA (setup.py)
-flask==1.1.4
+flask==2.2.5
     # via
     #   flask-babel
     #   flask-migrate
diff --git a/setup.py b/setup.py
index 270674fea3..368f7c6083 100644
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@ def get_file_list(file_path):
     "croniter>=0.3.8",
     "cryptography>=2.4.2",
     "defusedxml>=0.4.1",
-    "Flask>=0.10.1,<2.0",
+    "Flask>=0.10.1,<3.0",
     "Flask-Babel>=0.9,<3.0",
     "Flask-Migrate>=1.2.0,<3.0",
     "Flask-Script>=2.0.5",