diff --git a/.npmrc b/.npmrc
index 40b7fd92083..69cfc535561 100644
--- a/.npmrc
+++ b/.npmrc
@@ -1,7 +1,7 @@
 runtime = electron
 target_arch = x64
-brave_electron_version = 4.4.0
+brave_electron_version = 4.4.3
 chromedriver_version = 2.29
-target = v4.4.0
+target = v4.4.3
 disturl=https://brave-laptop-binaries.s3.amazonaws.com/atom-shell/dist/
 build_from_source = true
diff --git a/tools/cibuild.py b/tools/cibuild.py
index ed86af5e459..e4f11b25bcb 100755
--- a/tools/cibuild.py
+++ b/tools/cibuild.py
@@ -4,7 +4,7 @@
 import subprocess
 import sys
 import os.path
-MUON_VERSION = '4.4.0'
+MUON_VERSION = '4.4.3'
 CHROMEDRIVER_VERSION = '2.29'
 SOURCE_ROOT = os.path.abspath(os.path.dirname(os.path.dirname(__file__)))
 TARGET_ARCH= os.environ['TARGET_ARCH'] if os.environ.has_key('TARGET_ARCH') else 'x64'