diff --git a/b2g/confvars.sh b/b2g/confvars.sh
index 8f1b4d0fbbe7..a6cc19e52c56 100755
--- a/b2g/confvars.sh
+++ b/b2g/confvars.sh
@@ -10,7 +10,7 @@ MOZ_APP_UA_NAME=Firefox
 
 MOZ_UA_OS_AGNOSTIC=1
 
-MOZ_B2G_VERSION=1.0.0.0-prerelease
+MOZ_B2G_VERSION=2.0.0.0-prerelease
 MOZ_B2G_OS_NAME=Boot2Gecko
 
 MOZ_BRANDING_DIRECTORY=b2g/branding/unofficial