diff --git a/setup.cfg b/setup.cfg
index f2dd698..e91fd2d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -24,8 +24,8 @@ package_dir =
 packages = find:
 python_requires = >=3.6
 install_requires =
-    flask
-    flask-sock
+    flask >= 2
+    flask-sock >= 0.4
 
 [options.packages.find]
 where = src