diff --git a/docs/releases.md b/docs/releases.md
index 5c7fda91..ebbbbf1b 100644
--- a/docs/releases.md
+++ b/docs/releases.md
@@ -2,6 +2,12 @@
 Binaries for all releases can be found on the GitHub releases pages for the [ntfy server](https://github.com/binwiederhier/ntfy/releases)
 and the [ntfy Android app](https://github.com/binwiederhier/ntfy-android/releases).
 
+## ntfy server v2.1.1 (UNRELEASED)
+
+**Bug fixes + maintenance:**
+
+* Upgrade dialog: Disable submit button for free tier (no ticket)
+
 ## ntfy server v2.1.0
 Released February 25, 2023
 
diff --git a/go.sum b/go.sum
index bb28a8cd..6b890955 100644
--- a/go.sum
+++ b/go.sum
@@ -42,8 +42,6 @@ github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7
 github.com/gabriel-vasile/mimetype v1.4.1 h1:TRWk7se+TOjCYgRth7+1/OYLNiRNIotknkFtf/dnN7Q=
 github.com/gabriel-vasile/mimetype v1.4.1/go.mod h1:05Vi0w3Y9c/lNvJOdmIwvrrAhX3rYhfQQCaf9VJcv7M=
 github.com/golang-jwt/jwt/v4 v4.4.2/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w39/MY0Ch0=
-github.com/golang-jwt/jwt/v4 v4.4.3 h1:Hxl6lhQFj4AnOX6MLrsCb/+7tCj7DxP7VA+2rDIq5AU=
-github.com/golang-jwt/jwt/v4 v4.4.3/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w39/MY0Ch0=
 github.com/golang-jwt/jwt/v4 v4.5.0 h1:7cYmW1XlMY7h7ii7UhUyChSgS5wUJEnm9uZVTGqOWzg=
 github.com/golang-jwt/jwt/v4 v4.5.0/go.mod h1:m21LjoU+eqJr34lmDMbreY2eSTRJ1cv77w39/MY0Ch0=
 github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
@@ -103,8 +101,6 @@ github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/
 github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
 github.com/stretchr/testify v1.8.1 h1:w7B6lhMri9wdJUVmEZPGGhZzrYTPvgJArz7wNPgYKsk=
 github.com/stretchr/testify v1.8.1/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-github.com/stripe/stripe-go/v74 v74.8.0 h1:0+3EfQSBhMg8SQ1+w+AP6Gxyko2crWbUG2uXbzYs8SU=
-github.com/stripe/stripe-go/v74 v74.8.0/go.mod h1:5PoXNp30AJ3tGq57ZcFuaMylzNi8KpwlrYAFmO1fHZw=
 github.com/stripe/stripe-go/v74 v74.9.0 h1:yQ3O8jmtoAjKARzjLGmwYj2ZxqYbdtWVjFeovNGDtjg=
 github.com/stripe/stripe-go/v74 v74.9.0/go.mod h1:5PoXNp30AJ3tGq57ZcFuaMylzNi8KpwlrYAFmO1fHZw=
 github.com/urfave/cli/v2 v2.24.4 h1:0gyJJEBYtCV87zI/x2nZCPyDxD51K6xM8SkwjHFCNEU=
@@ -180,8 +176,6 @@ google.golang.org/appengine/v2 v2.0.2/go.mod h1:PkgRUWz4o1XOvbqtWTkBtCitEJ5Tp4Ho
 google.golang.org/genproto v0.0.0-20180817151627-c66870c02cf8/go.mod h1:JiN7NxoALGmiZfu7CAH4rXhgtRTLTxftemlI0sWmxmc=
 google.golang.org/genproto v0.0.0-20190819201941-24fa4b261c55/go.mod h1:DMBHOl98Agz4BDEuKkezgsaosCRResVns1a3J2ZsMNc=
 google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013/go.mod h1:NbSheEEYHJ7i3ixzK3sjbqSGDJWnxyFXZblF3eUsNvo=
-google.golang.org/genproto v0.0.0-20230216225411-c8e22ba71e44 h1:EfLuoKW5WfkgVdDy7dTK8qSbH37AX5mj/MFh+bGPz14=
-google.golang.org/genproto v0.0.0-20230216225411-c8e22ba71e44/go.mod h1:8B0gmkoRebU8ukX6HP+4wrVQUY1+6PkQ44BSyIlflHA=
 google.golang.org/genproto v0.0.0-20230223222841-637eb2293923 h1:znp6mq/drrY+6khTAlJUDNFFcDGV2ENLYKpMq8SyCds=
 google.golang.org/genproto v0.0.0-20230223222841-637eb2293923/go.mod h1:3Dl5ZL0q0isWJt+FVcfpQyirqemEuLAK/iFvg1UP1Hw=
 google.golang.org/grpc v1.19.0/go.mod h1:mqu4LbDTu4XGKhr4mRzUsmM4RtVoemTSY81AxZiDr8c=
diff --git a/web/src/components/UpgradeDialog.js b/web/src/components/UpgradeDialog.js
index a46313ab..6937e31b 100644
--- a/web/src/components/UpgradeDialog.js
+++ b/web/src/components/UpgradeDialog.js
@@ -56,7 +56,7 @@ const UpgradeDialog = (props) => {
         submitButtonLabel = t("account_upgrade_dialog_button_redirect_signup");
         submitAction = Action.REDIRECT_SIGNUP;
         banner = null;
-    } else if (currentTierCode === newTierCode && currentInterval === interval) {
+    } else if (currentTierCode === newTierCode && (currentInterval === undefined || currentInterval === interval)) {
         submitButtonLabel = t("account_upgrade_dialog_button_update_subscription");
         submitAction = null;
         banner = (currentTierCode) ? Banner.PRORATION_INFO : null;