diff --git a/mozcentral.version b/mozcentral.version
index f72b9ef3..55aeecbf 100644
--- a/mozcentral.version
+++ b/mozcentral.version
@@ -1 +1 @@
-cdfe9f2e144a04618cb6e9ffd9e6202d6d85ed56
+6bca861985ba51920c1cacc21986af01c51bd690
diff --git a/setup.sh b/setup.sh
index a3b23f0b..2001a374 100755
--- a/setup.sh
+++ b/setup.sh
@@ -44,8 +44,8 @@ echo "Done installing dependencies"
 echo "Downloading spidermonkey source code"
 # Read the commit hash for mozilla-central from the `mozcentral.version` file
 MOZCENTRAL_VERSION=$(cat mozcentral.version)
-wget -c -q -O firefox-source-${MOZCENTRAL_VERSION}.zip https://github.com/mozilla/gecko-dev/archive/${MOZCENTRAL_VERSION}.zip
-unzip -q firefox-source-${MOZCENTRAL_VERSION}.zip && mv gecko-dev-${MOZCENTRAL_VERSION} firefox-source
+wget -c -q -O firefox-source-${MOZCENTRAL_VERSION}.zip https://github.com/mozilla-firefox/firefox/archive/${MOZCENTRAL_VERSION}.zip
+unzip -q firefox-source-${MOZCENTRAL_VERSION}.zip && mv firefox-${MOZCENTRAL_VERSION} firefox-source
 echo "Done downloading spidermonkey source code"
 
 echo "Building spidermonkey"