--- a/python/mozboot/mozboot/freebsd.py
+++ b/python/mozboot/mozboot/freebsd.py
@@ -66,16 +66,16 @@ class FreeBSDBootstrapper(BaseBootstrapp
     def install_browser_artifact_mode_packages(self):
         self.ensure_browser_packages(artifact_mode=True)
 
     def ensure_browser_packages(self, artifact_mode=False):
         # TODO: Figure out what not to install for artifact mode
         self.pkg_install(*self.browser_packages)
 
     def ensure_stylo_packages(self, state_dir):
-        self.pkg_install('llvm39')
+        self.pkg_install('llvm40')
 
     def suggest_browser_mozconfig(self):
         if self.stylo:
             print(STYLO_MOZCONFIG)
 
     def upgrade_mercurial(self, current):
         self.pkg_install('mercurial')