diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7b89a5c92..cd4b1a55c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Passed Zoekt index parameters via argv to preserve revision names with punctuation. [#1376](https://github.com/sourcebot-dev/sourcebot/pull/1376)
 - [EE] Validated OAuth bearer token scopes before allowing access to the Sourcebot MCP resource server. [#1396](https://github.com/sourcebot-dev/sourcebot/pull/1396)
 - Added HTTP security headers to all web app responses. [#1407](https://github.com/sourcebot-dev/sourcebot/pull/1407)
+- Upgraded `nodemailer` to `^9.0.1`. [#1356](https://github.com/sourcebot-dev/sourcebot/pull/1356)
 
 ## [5.0.4] - 2026-06-18
 
diff --git a/packages/web/package.json b/packages/web/package.json
index 397d0df21..abd1756aa 100644
--- a/packages/web/package.json
+++ b/packages/web/package.json
@@ -167,7 +167,7 @@
     "next-auth": "^5.0.0-beta.30",
     "next-navigation-guard": "^0.2.0",
     "next-themes": "^0.3.0",
-    "nodemailer": "^8.0.9",
+    "nodemailer": "^9.0.1",
     "octokit": "^4.1.3",
     "openai": "^4.98.0",
     "parse-diff": "^0.11.1",
diff --git a/yarn.lock b/yarn.lock
index c0c1cb7ad..917986f5b 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9497,7 +9497,7 @@ __metadata:
     next-auth: "npm:^5.0.0-beta.30"
     next-navigation-guard: "npm:^0.2.0"
     next-themes: "npm:^0.3.0"
-    nodemailer: "npm:^8.0.9"
+    nodemailer: "npm:^9.0.1"
     npm-run-all: "npm:^4.1.5"
     octokit: "npm:^4.1.3"
     openai: "npm:^4.98.0"
@@ -18968,10 +18968,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"nodemailer@npm:^8.0.9":
-  version: 8.0.11
-  resolution: "nodemailer@npm:8.0.11"
-  checksum: 10c0/19229216c63a32eae59d7b39f3dffeba20be317f2335d08d86fb70bd01845a1bf108fecd019c0e90ef186e3d9177cf478192b333cf38620ad0f8c7a6e1e5ae05
+"nodemailer@npm:^9.0.1":
+  version: 9.0.1
+  resolution: "nodemailer@npm:9.0.1"
+  checksum: 10c0/4213f01aa211127c1ce33243c5e45e7f831601a933d03fa864cd827b1bd5ea2782cb4b43722bee7028cbc193733d9802dad1120fe67181448eb0b7de52218a37
   languageName: node
   linkType: hard