diff --git a/functions/package-lock.json b/functions/package-lock.json
index a967b1c..5f533ed 100644
--- a/functions/package-lock.json
+++ b/functions/package-lock.json
@@ -6,10 +6,11 @@
     "": {
       "name": "functions",
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         "express": "^4.18.2",
         "firebase": "^9.15.0",
         "firebase-admin": "^11.4.1",
-        "firebase-functions": "^4.4.1",
+        "firebase-functions": "^4.7.0",
         "node-fetch": "^2.6.1"
       },
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@@ -28,7 +29,7 @@
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+        "node": "20"
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@@ -3202,6 +3203,49 @@
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@@ -3928,6 +3977,11 @@
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@@ -3950,6 +4004,16 @@
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@@ -4565,6 +4640,14 @@
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@@ -5553,6 +5636,11 @@
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@@ -5853,9 +5941,9 @@
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@@ -5871,7 +5959,7 @@
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@@ -5933,6 +6021,25 @@
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+          "url": "https://github.com/sponsors/RubenVerborgh"
+        }
+      ],
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@@ -5942,6 +6049,19 @@
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@@ -6751,6 +6871,11 @@
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@@ -8471,6 +8595,14 @@
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@@ -8510,6 +8642,49 @@
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@@ -12693,6 +12872,37 @@
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     "depd": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
@@ -14478,6 +14721,11 @@
       "integrity": "sha512-i/2XbnSz/uxRCU6+NdVJgKWDTM427+MqYbkQzD321DuCQJUqOuJKIA0IM2+W2xtYHdKOmZ4dR6fExsd4SXL+WQ==",
       "optional": true
     },
+    "eventemitter3": {
+      "version": "5.0.1",
+      "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-5.0.1.tgz",
+      "integrity": "sha512-GWkBvjiSZK87ELrYOSESUYeVIc9mvLLf/nXalMOS5dYrgZq9o5OVkbZAVM06CVxYsCwH9BDZFPlQTlPA1j4ahA=="
+    },
     "execa": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/execa/-/execa-5.1.1.tgz",
@@ -14744,9 +14992,9 @@
       }
     },
     "firebase-functions": {
-      "version": "4.4.1",
-      "resolved": "https://registry.npmjs.org/firebase-functions/-/firebase-functions-4.4.1.tgz",
-      "integrity": "sha512-3no53Lg12ToNlPSgLZtAFLQAz6si7ilHvzO8NC3/2EybyUwegpj5YhHwNiCw839lmAWp3znjATJDTvADFiZMrg==",
+      "version": "4.7.0",
+      "resolved": "https://registry.npmjs.org/firebase-functions/-/firebase-functions-4.7.0.tgz",
+      "integrity": "sha512-YgWqA9otWlBUouY4I2yd0vq9SyQdQ6GJxfH7wGJclzS2pzBQHcU5HhE1Vz/xTrWcKJyw8uPN98WtSE9/APUJJg==",
       "requires": {
         "@types/cors": "^2.8.5",
         "@types/express": "4.17.3",
@@ -14810,6 +15058,11 @@
       "dev": true,
       "peer": true
     },
+    "follow-redirects": {
+      "version": "1.15.5",
+      "resolved": "https://registry.npmjs.org/follow-redirects/-/follow-redirects-1.15.5.tgz",
+      "integrity": "sha512-vSFWUON1B+yAw1VN4xMfxgn5fTUiaOzAJCKBwIIgT/+7CuGy9+r+5gITvP62j3RmaD5Ph65UaERdOSRGUzZtgw=="
+    },
     "for-each": {
       "version": "0.3.3",
       "resolved": "https://registry.npmjs.org/for-each/-/for-each-0.3.3.tgz",
@@ -14819,6 +15072,16 @@
         "is-callable": "^1.1.3"
       }
     },
+    "form-data": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-4.0.0.tgz",
+      "integrity": "sha512-ETEklSGi5t0QMZuiXoA/Q6vcnxcLQP5vdugSpuAyi6SVGi2clPPp+xgEhuMaHC+zGgn31Kd235W35f7Hykkaww==",
+      "requires": {
+        "asynckit": "^0.4.0",
+        "combined-stream": "^1.0.8",
+        "mime-types": "^2.1.12"
+      }
+    },
     "forwarded": {
       "version": "0.2.0",
       "resolved": "https://registry.npmjs.org/forwarded/-/forwarded-0.2.0.tgz",
@@ -15400,6 +15663,11 @@
         "has-tostringtag": "^1.0.0"
       }
     },
+    "is-electron": {
+      "version": "2.2.2",
+      "resolved": "https://registry.npmjs.org/is-electron/-/is-electron-2.2.2.tgz",
+      "integrity": "sha512-FO/Rhvz5tuw4MCWkpMzHFKWD2LsfHzIb7i6MdPYZ/KW7AlxawyLkqdy+jPZP1WubqEADE3O4FUENlJHDfQASRg=="
+    },
     "is-extglob": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/is-extglob/-/is-extglob-2.1.1.tgz",
@@ -15469,8 +15737,7 @@
     "is-stream": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-2.0.1.tgz",
-      "integrity": "sha512-hFoiJiTl63nn+kstHGBtewWSKnQLpyb155KHheA1l39uvtO9nWIop1p3udqPcUd/xbF1VLMO4n7OI6p7RbngDg==",
-      "devOptional": true
+      "integrity": "sha512-hFoiJiTl63nn+kstHGBtewWSKnQLpyb155KHheA1l39uvtO9nWIop1p3udqPcUd/xbF1VLMO4n7OI6p7RbngDg=="
     },
     "is-stream-ended": {
       "version": "0.1.4",
@@ -16734,6 +17001,11 @@
         "word-wrap": "^1.2.3"
       }
     },
+    "p-finally": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/p-finally/-/p-finally-1.0.0.tgz",
+      "integrity": "sha512-LICb2p9CB7FS+0eR1oqWnHhp0FljGLZCWBE9aix0Uye9W8LTQPwMTYVGWQWIw9RdQiDg4+epXQODwIYJtSJaow=="
+    },
     "p-limit": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/p-limit/-/p-limit-3.1.0.tgz",
@@ -16763,6 +17035,39 @@
         }
       }
     },
+    "p-queue": {
+      "version": "6.6.2",
+      "resolved": "https://registry.npmjs.org/p-queue/-/p-queue-6.6.2.tgz",
+      "integrity": "sha512-RwFpb72c/BhQLEXIZ5K2e+AhgNVmIejGlTgiB9MzZ0e93GRvqZ7uSi0dvRF7/XIXDeNkra2fNHBxTyPDGySpjQ==",
+      "requires": {
+        "eventemitter3": "^4.0.4",
+        "p-timeout": "^3.2.0"
+      },
+      "dependencies": {
+        "eventemitter3": {
+          "version": "4.0.7",
+          "resolved": "https://registry.npmjs.org/eventemitter3/-/eventemitter3-4.0.7.tgz",
+          "integrity": "sha512-8guHBZCwKnFhYdHr2ysuRWErTwhoN2X8XELRlrRwpmfeY2jjuUN4taQMsULKUVo1K4DvZl+0pgfyoysHxvmvEw=="
+        }
+      }
+    },
+    "p-retry": {
+      "version": "4.6.2",
+      "resolved": "https://registry.npmjs.org/p-retry/-/p-retry-4.6.2.tgz",
+      "integrity": "sha512-312Id396EbJdvRONlngUx0NydfrIQ5lsYu0znKVUzVvArzEIt08V1qhtyESbGVd1FGX7UKtiFp5uwKZdM8wIuQ==",
+      "requires": {
+        "@types/retry": "0.12.0",
+        "retry": "^0.13.1"
+      }
+    },
+    "p-timeout": {
+      "version": "3.2.0",
+      "resolved": "https://registry.npmjs.org/p-timeout/-/p-timeout-3.2.0.tgz",
+      "integrity": "sha512-rhIwUycgwwKcP9yTOOFK/AKsAopjjCakVqLHePO3CC6Mir1Z99xT+R63jZxAT5lFZLa2inS5h+ZS2GvR99/FBg==",
+      "requires": {
+        "p-finally": "^1.0.0"
+      }
+    },
     "p-try": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/p-try/-/p-try-1.0.0.tgz",
@@ -17039,6 +17344,11 @@
         "ipaddr.js": "1.9.1"
       }
     },
+    "proxy-from-env": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/proxy-from-env/-/proxy-from-env-1.1.0.tgz",
+      "integrity": "sha512-D+zkORCbA9f1tdWRK0RaCR3GPv50cMxcrz4X8k5LTSUD1Dkw47mKJEZQNunItRTkWwgtaUSo1RVFRIG9ZXiFYg=="
+    },
     "pseudomap": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
@@ -17247,8 +17557,7 @@
     "retry": {
       "version": "0.13.1",
       "resolved": "https://registry.npmjs.org/retry/-/retry-0.13.1.tgz",
-      "integrity": "sha512-XQBQ3I8W1Cge0Seh+6gjj03LbmRFWuoszgK9ooCpwYIrhhoO80pfq4cUkU5DkknwfOfFteRwlZ56PYOGYyFWdg==",
-      "optional": true
+      "integrity": "sha512-XQBQ3I8W1Cge0Seh+6gjj03LbmRFWuoszgK9ooCpwYIrhhoO80pfq4cUkU5DkknwfOfFteRwlZ56PYOGYyFWdg=="
     },
     "retry-request": {
       "version": "5.0.2",
diff --git a/functions/package.json b/functions/package.json
index e055fc2..10fb286 100644
--- a/functions/package.json
+++ b/functions/package.json
@@ -10,14 +10,15 @@
     "logs": "firebase functions:log"
   },
   "engines": {
-    "node": "16"
+    "node": "20"
   },
   "main": "lib/functions/src/index.js",
   "dependencies": {
+    "@slack/web-api": "^7.0.2",
     "express": "^4.18.2",
     "firebase": "^9.15.0",
     "firebase-admin": "^11.4.1",
-    "firebase-functions": "^4.4.1",
+    "firebase-functions": "^4.7.0",
     "node-fetch": "^2.6.1"
   },
   "devDependencies": {
diff --git a/functions/src/index.ts b/functions/src/index.ts
index a0a2e11..be4913f 100644
--- a/functions/src/index.ts
+++ b/functions/src/index.ts
@@ -1,8 +1,10 @@
 import { Request, Response } from 'firebase-functions';
 
 const functions = require('firebase-functions');
+const { onValueWritten } = require('firebase-functions/v2/database');
 const admin = require('firebase-admin/app');
 const { updateCurrentMatch } = require('./updateCurrentMatch');
+const { statusUpdateHandler } = require('./statusUpdateHandler');
 
 admin.initializeApp();
 functions.logger.info('Initialized Firebase app');
@@ -12,6 +14,22 @@ exports.updateCurrentMatch = functions.pubsub.schedule('every 1 minutes')
     await updateCurrentMatch();
   });
 
+exports.notifyStateChanges = onValueWritten({
+  ref: '/seasons/{season}/events/{eventKey}/state',
+  instance: 'fim-queueing-default-rtdb',
+}, async (event: any) => {
+  const original = event.data.before.val();
+  const updated = event.data.after.val();
+
+  if (!original || !updated) {
+    return null;
+  }
+
+  await statusUpdateHandler(original, updated, event.params.season, event.params.eventKey);
+
+  return null;
+});
+
 exports.reportError = functions.https.onRequest(
   (req: Request, res: Response) => {
     functions.logger.write({
diff --git a/functions/src/statusUpdateHandler.ts b/functions/src/statusUpdateHandler.ts
new file mode 100644
index 0000000..15d93d7
--- /dev/null
+++ b/functions/src/statusUpdateHandler.ts
@@ -0,0 +1,50 @@
+import { Event } from '../../shared/DbTypes';
+
+const functions = require('firebase-functions');
+const admin = require('firebase-admin');
+const { WebClient } = require('@slack/web-api');
+
+let slackClient: typeof WebClient | undefined;
+
+exports.statusUpdateHandler = async (oldState: string, newState: string, season: number,
+  key: string): Promise<void> => {
+  if (oldState === newState) return;
+
+  if (slackClient === undefined) slackClient = new WebClient(process.env.SLACK_API_TOKEN);
+  let notificationChannel: string | undefined;
+
+  if (process.env.SLACK_NOTIFICATION_CHANNEL) {
+    notificationChannel = process.env.SLACK_NOTIFICATION_CHANNEL as string;
+  } else {
+    functions.logger.error("Didn't get a Slack notification channel");
+    return;
+  }
+
+  const eventSnap = await admin
+    .database()
+    .ref(`/seasons/${season}/events/${key}`)
+    .once('value');
+
+  const event: Event = await eventSnap.val();
+
+  let statusText: string | undefined;
+
+  if (newState === 'QualsInProgress') {
+    statusText = 'has published their qualification schedule';
+  } else if (newState === 'AwaitingAlliances') {
+    statusText = 'has finished their qualification matches';
+  } else if (newState === 'EventOver') {
+    statusText = 'has completed their event';
+  }
+
+  if (statusText) {
+    try {
+      await slackClient.chat.postMessage({
+        text: `➡️ ${event.name} ${statusText}`,
+        channel: notificationChannel,
+      });
+    } catch (err) {
+      functions.logger.error('Failed to send Slack message', err);
+    }
+  }
+};