diff --git a/browsers.json b/browsers.json
index 4605a70..b17e14b 100644
--- a/browsers.json
+++ b/browsers.json
@@ -36,27 +36,27 @@
     "files": {
       "linux": {
         "386": {
-          "url": "https://github.com/mozilla/geckodriver/releases/download/v0.20.1/geckodriver-v0.20.1-linux32.tar.gz",
+          "url": "https://github.com/mozilla/geckodriver/releases/download/v0.21.0/geckodriver-v0.21.0-linux32.tar.gz",
           "filename": "geckodriver"
         },
         "amd64": {
-          "url": "https://github.com/mozilla/geckodriver/releases/download/v0.20.1/geckodriver-v0.20.1-linux64.tar.gz",
+          "url": "https://github.com/mozilla/geckodriver/releases/download/v0.21.0/geckodriver-v0.21.0-linux64.tar.gz",
           "filename": "geckodriver"
         }
       },
       "darwin": {
         "amd64": {
-          "url": "https://github.com/mozilla/geckodriver/releases/download/v0.20.1/geckodriver-v0.20.1-macos.tar.gz",
+          "url": "https://github.com/mozilla/geckodriver/releases/download/v0.21.0/geckodriver-v0.21.0-macos.tar.gz",
           "filename": "geckodriver"
         }
       },
       "windows": {
         "386": {
-          "url": "https://github.com/mozilla/geckodriver/releases/download/v0.18.0/geckodriver-v0.18.0-win32.zip",
+          "url": "https://github.com/mozilla/geckodriver/releases/download/v0.21.0/geckodriver-v0.21.0-win32.zip",
           "filename": "geckodriver.exe"
         },
         "amd64": {
-          "url": "https://github.com/mozilla/geckodriver/releases/download/v0.20.1/geckodriver-v0.20.1-win64.zip",
+          "url": "https://github.com/mozilla/geckodriver/releases/download/v0.21.0/geckodriver-v0.21.0-win64.zip",
           "filename": "geckodriver.exe"
         }
       }