diff --git a/CHANGELOG.md b/CHANGELOG.md
index cdfed5ba5..88d24adea 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,8 @@
 
 ## unreleased
 
+## 3.0.0-rc.0 / 2024-10-31
+
 * [CHANGE] Scraping: Remove implicit fallback to the Prometheus text format in case of invalid/missing Content-Type and fail the scrape instead. Add ability to specify a `fallback_scrape_protocol` in the scrape config. #15136
 * [CHANGE] Remote-write: default enable_http2 to false. #15219
 * [CHANGE] Scraping: normalize "le" and "quantile" label values upon ingestion. #15164
diff --git a/VERSION b/VERSION
index 1941d5282..3c6eac305 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-3.0.0-beta.1
+3.0.0-rc.0
diff --git a/web/ui/mantine-ui/package.json b/web/ui/mantine-ui/package.json
index 4e886e482..679685a50 100644
--- a/web/ui/mantine-ui/package.json
+++ b/web/ui/mantine-ui/package.json
@@ -1,7 +1,7 @@
 {
   "name": "@prometheus-io/mantine-ui",
   "private": true,
-  "version": "0.300.0-beta.1",
+  "version": "0.300.0-rc.0",
   "type": "module",
   "scripts": {
     "start": "vite",
@@ -28,7 +28,7 @@
     "@microsoft/fetch-event-source": "^2.0.1",
     "@nexucis/fuzzy": "^0.5.1",
     "@nexucis/kvsearch": "^0.9.1",
-    "@prometheus-io/codemirror-promql": "0.300.0-beta.1",
+    "@prometheus-io/codemirror-promql": "0.300.0-rc.0",
     "@reduxjs/toolkit": "^2.2.1",
     "@tabler/icons-react": "^3.19.0",
     "@tanstack/react-query": "^5.59.0",
diff --git a/web/ui/module/codemirror-promql/package.json b/web/ui/module/codemirror-promql/package.json
index bcc546479..feb75d73f 100644
--- a/web/ui/module/codemirror-promql/package.json
+++ b/web/ui/module/codemirror-promql/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@prometheus-io/codemirror-promql",
-  "version": "0.300.0-beta.1",
+  "version": "0.300.0-rc.0",
   "description": "a CodeMirror mode for the PromQL language",
   "types": "dist/esm/index.d.ts",
   "module": "dist/esm/index.js",
@@ -29,7 +29,7 @@
   },
   "homepage": "https://github.com/prometheus/prometheus/blob/main/web/ui/module/codemirror-promql/README.md",
   "dependencies": {
-    "@prometheus-io/lezer-promql": "0.300.0-beta.1",
+    "@prometheus-io/lezer-promql": "0.300.0-rc.0",
     "lru-cache": "^11.0.1"
   },
   "devDependencies": {
diff --git a/web/ui/module/lezer-promql/package.json b/web/ui/module/lezer-promql/package.json
index 0883552c8..49e54c40a 100644
--- a/web/ui/module/lezer-promql/package.json
+++ b/web/ui/module/lezer-promql/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@prometheus-io/lezer-promql",
-  "version": "0.300.0-beta.1",
+  "version": "0.300.0-rc.0",
   "description": "lezer-based PromQL grammar",
   "main": "dist/index.cjs",
   "type": "module",
diff --git a/web/ui/package-lock.json b/web/ui/package-lock.json
index 10b14a8bc..242179a08 100644
--- a/web/ui/package-lock.json
+++ b/web/ui/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "prometheus-io",
-  "version": "0.300.0-beta.1",
+  "version": "0.300.0-rc.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "prometheus-io",
-      "version": "0.300.0-beta.1",
+      "version": "0.300.0-rc.0",
       "workspaces": [
         "mantine-ui",
         "module/*"
@@ -24,7 +24,7 @@
     },
     "mantine-ui": {
       "name": "@prometheus-io/mantine-ui",
-      "version": "0.300.0-beta.1",
+      "version": "0.300.0-rc.0",
       "dependencies": {
         "@codemirror/autocomplete": "^6.18.1",
         "@codemirror/language": "^6.10.2",
@@ -42,7 +42,7 @@
         "@microsoft/fetch-event-source": "^2.0.1",
         "@nexucis/fuzzy": "^0.5.1",
         "@nexucis/kvsearch": "^0.9.1",
-        "@prometheus-io/codemirror-promql": "0.300.0-beta.1",
+        "@prometheus-io/codemirror-promql": "0.300.0-rc.0",
         "@reduxjs/toolkit": "^2.2.1",
         "@tabler/icons-react": "^3.19.0",
         "@tanstack/react-query": "^5.59.0",
@@ -155,10 +155,10 @@
     },
     "module/codemirror-promql": {
       "name": "@prometheus-io/codemirror-promql",
-      "version": "0.300.0-beta.1",
+      "version": "0.300.0-rc.0",
       "license": "Apache-2.0",
       "dependencies": {
-        "@prometheus-io/lezer-promql": "0.300.0-beta.1",
+        "@prometheus-io/lezer-promql": "0.300.0-rc.0",
         "lru-cache": "^11.0.1"
       },
       "devDependencies": {
@@ -188,7 +188,7 @@
     },
     "module/lezer-promql": {
       "name": "@prometheus-io/lezer-promql",
-      "version": "0.300.0-beta.1",
+      "version": "0.300.0-rc.0",
       "license": "Apache-2.0",
       "devDependencies": {
         "@lezer/generator": "^1.7.1",
diff --git a/web/ui/package.json b/web/ui/package.json
index 6d6e28010..ab23c6363 100644
--- a/web/ui/package.json
+++ b/web/ui/package.json
@@ -1,7 +1,7 @@
 {
   "name": "prometheus-io",
   "description": "Monorepo for the Prometheus UI",
-  "version": "0.300.0-beta.1",
+  "version": "0.300.0-rc.0",
   "private": true,
   "scripts": {
     "build": "bash build_ui.sh --all",
diff --git a/web/ui/react-app/package-lock.json b/web/ui/react-app/package-lock.json
index d3de03e5e..a4c5af6ce 100644
--- a/web/ui/react-app/package-lock.json
+++ b/web/ui/react-app/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@prometheus-io/app",
-  "version": "0.55.0",
+  "version": "0.300.0-rc.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@prometheus-io/app",
-      "version": "0.55.0",
+      "version": "0.300.0-rc.0",
       "dependencies": {
         "@codemirror/autocomplete": "^6.17.0",
         "@codemirror/commands": "^6.6.0",
diff --git a/web/ui/react-app/package.json b/web/ui/react-app/package.json
index d75aba5c4..9711a09e8 100644
--- a/web/ui/react-app/package.json
+++ b/web/ui/react-app/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@prometheus-io/app",
-  "version": "0.55.0",
+  "version": "0.300.0-rc.0",
   "private": true,
   "dependencies": {
     "@codemirror/autocomplete": "^6.17.0",