diff --git a/src/constants.ts b/src/constants.ts
index 8fb840d..c5160cf 100644
--- a/src/constants.ts
+++ b/src/constants.ts
@@ -10,12 +10,12 @@ export const DEFAULT_CHROME_VERSION = '100.0.4896.75';
 
 // Update each of these periodically
 // https://product-details.mozilla.org/1.0/firefox_versions.json
-export const DEFAULT_FIREFOX_VERSION = '99.0';
+export const DEFAULT_FIREFOX_VERSION = '99.0.1';
 
 // https://en.wikipedia.org/wiki/Safari_version_history
 export const DEFAULT_SAFARI_VERSION = {
   majorVersion: 15,
-  version: '15.0',
+  version: '15.4',
   webkitVersion: '605.1.15',
 };
 
diff --git a/src/infer/inferTitle.ts b/src/infer/inferTitle.ts
index 744bccf..166e57b 100644
--- a/src/infer/inferTitle.ts
+++ b/src/infer/inferTitle.ts
@@ -2,7 +2,7 @@ import axios from 'axios';
 import * as log from 'loglevel';
 
 const USER_AGENT =
-  'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2227.1 Safari/537.36';
+  'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/15.4 Safari/605.1.15';
 
 export async function inferTitle(url: string): Promise<string> {
   const { data } = await axios.get<string>(url, {
diff --git a/src/options/fields/userAgent.ts b/src/options/fields/userAgent.ts
index 05007fd..f31d610 100644
--- a/src/options/fields/userAgent.ts
+++ b/src/options/fields/userAgent.ts
@@ -81,7 +81,10 @@ async function edgeUserAgent(
 async function firefoxUserAgent(platform: string): Promise<string> {
   const firefoxVersion = await getLatestFirefoxVersion();
 
-  return `Mozilla/5.0 (${platform}; rv:${firefoxVersion}) Gecko/20100101 Firefox/${firefoxVersion}`;
+  return `Mozilla/5.0 (${platform}; rv:${firefoxVersion}) Gecko/20100101 Firefox/${firefoxVersion}`.replace(
+    '10_15_7',
+    '10.15',
+  );
 }
 
 async function safariUserAgent(platform: string): Promise<string> {