--- a/testing/mozharness/mozharness/mozilla/testing/talos.py
+++ b/testing/mozharness/mozharness/mozilla/testing/talos.py
@@ -493,17 +493,17 @@ class Talos(TestingMixin, MercurialScrip
         self.py3_install_requirement_files(requirements)
         # add py3 executables path to system path
         sys.path.insert(1, self.py3_path_to_executables())
 
     def install_mitmproxy(self):
         """Install the mitmproxy tool into the Python 3.x env"""
         self.info("Installing mitmproxy")
         if 'win' in self.platform_name():
-            self.py3_install_modules(modules=['mitmproxy'])
+            self.py3_install_modules(modules=['mitmproxy==2.0.2'])
             self.mitmdump = os.path.join(self.py3_path_to_executables(), 'mitmdump')
         else:
             # on macosx and linux64 we use a prebuilt mitmproxy release binary
             mitmproxy_path = os.path.join(self.talos_path, 'talos', 'mitmproxy')
             self.mitmdump = os.path.join(mitmproxy_path, 'mitmdump')
             if not os.path.exists(self.mitmdump):
                 # download the mitmproxy release binary; will be overridden by the --no-download
                 if '--no-download' not in self.config['talos_extra_options']: