diff --git a/.env.example b/.env.example
index a8d8c7d..69ada3b 100644
--- a/.env.example
+++ b/.env.example
@@ -14,3 +14,8 @@ FTP_USER=your-ftp-username
 FTP_PASS=your-ftp-password
 # Remote directory to upload signed artifacts (e.g., /addons/archive-org-link-grabber/)
 FTP_REMOTE_DIR=/path/on/server
+
+# SFTP host verification (SFTP only; choose one)
+# SFTP_KNOWN_HOSTS=/home/you/.ssh/known_hosts
+# SFTP_HOST_PUBKEY_SHA256=base64sha256fingerprint
+# SFTP_HOST_PUBKEY_MD5=aa:bb:cc:dd:...
diff --git a/scripts/release-push.js b/scripts/release-push.js
index 6f2214d..b04c209 100644
--- a/scripts/release-push.js
+++ b/scripts/release-push.js
@@ -9,6 +9,14 @@
  *   FTP_USER=username (required)
  *   FTP_PASS=password (required)
  *   FTP_REMOTE_DIR=/remote/path (required)
+ *
+ * SFTP notes:
+ *   - SFTP requires host verification. Provide one of:
+ *       SFTP_KNOWN_HOSTS=/path/to/known_hosts
+ *       SFTP_HOST_PUBKEY_SHA256=base64_sha256_fingerprint
+ *       SFTP_HOST_PUBKEY_MD5=aa:bb:cc:... (legacy)
+ *     If not provided and no default known_hosts is found, curl will fail with
+ *     "Couldn't find a known_hosts file".
  */
 const fs = require('fs');
 const path = require('path');
@@ -91,6 +99,11 @@ const user = process.env.FTP_USER;
 const pass = process.env.FTP_PASS;
 let remoteDir = process.env.FTP_REMOTE_DIR || '/';
 
+// SFTP host verification options (optional)
+const sftpKnownHosts = process.env.SFTP_KNOWN_HOSTS || process.env.FTP_SSH_KNOWN_HOSTS;
+const sftpHostPubSha256 = process.env.SFTP_HOST_PUBKEY_SHA256 || process.env.FTP_SSH_HOST_PUBKEY_SHA256;
+const sftpHostPubMd5 = process.env.SFTP_HOST_PUBKEY_MD5 || process.env.FTP_SSH_HOST_PUBKEY_MD5;
+
 if (!host || !user || !pass || !remoteDir) {
   console.error('Missing FTP config. Required: FTP_HOST, FTP_USER, FTP_PASS, FTP_REMOTE_DIR');
   process.exit(1);
@@ -100,9 +113,23 @@ if (!host || !user || !pass || !remoteDir) {
 if (!remoteDir.startsWith('/')) remoteDir = '/' + remoteDir;
 if (remoteDir.endsWith('/')) remoteDir = remoteDir.slice(0, -1);
 
-// Construct base URL for FTP upload target
+// Construct base URL for FTP/SFTP upload target
 const baseUrl = `${protocol}://${host}${port ? `:${port}` : ''}${remoteDir}`;
 
+// Prepare common curl flags
+const curlBase = ['curl', '--fail', '--ftp-create-dirs'];
+if (protocol === 'sftp') {
+  if (sftpKnownHosts) {
+    curlBase.push('--knownhosts', JSON.stringify(sftpKnownHosts));
+  } else if (sftpHostPubSha256) {
+    curlBase.push('--hostpubsha256', JSON.stringify(sftpHostPubSha256));
+  } else if (sftpHostPubMd5) {
+    curlBase.push('--hostpubmd5', JSON.stringify(sftpHostPubMd5));
+  } else {
+    console.warn('SFTP: no known_hosts or host public key provided; relying on default known_hosts.');
+  }
+}
+
 // Prepare or update self-hosted updates.json before upload
 function ensureUpdatesJson() {
   try {
@@ -164,9 +191,7 @@ for (const file of files) {
   const url = `${baseUrl}/${encodeURIComponent(file)}`;
   // --ftp-create-dirs ensures remote dirs are created; --fail fails on server errors.
   const cmd = [
-    'curl',
-    '--fail',
-    '--ftp-create-dirs',
+    ...curlBase,
     `--user`, `${user}:${pass}`,
     '--upload-file', JSON.stringify(localPath),
     JSON.stringify(url),
@@ -181,9 +206,7 @@ try {
   const latestUrl = `${baseUrl}/${latestAlias}`;
   console.log(`Uploading latest alias ${latestAlias} -> ${chosenXpi}`);
   const latestCmd = [
-    'curl',
-    '--fail',
-    '--ftp-create-dirs',
+    ...curlBase,
     `--user`, `${user}:${pass}`,
     '--upload-file', JSON.stringify(localLatestSrc),
     JSON.stringify(latestUrl),
@@ -199,9 +222,7 @@ if (fs.existsSync(updatesPath)) {
   const updatesUrl = `${baseUrl}/updates.json`;
   console.log(`Uploading updates.json to ${updatesUrl}`);
   const cmd = [
-    'curl',
-    '--fail',
-    '--ftp-create-dirs',
+    ...curlBase,
     `--user`, `${user}:${pass}`,
     '--upload-file', JSON.stringify(updatesPath),
     JSON.stringify(updatesUrl),