diff --git a/.npmrc b/.npmrc
index 39b386269ae..2d302cd3aa3 100644
--- a/.npmrc
+++ b/.npmrc
@@ -1,7 +1,7 @@
 runtime = electron
 target_arch = x64
-brave_electron_version = 4.5.30
+brave_electron_version = 4.5.31
 chromedriver_version = 2.33
-target = v4.5.30
+target = v4.5.31
 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 c76dcb97e04..57337fc2990 100755
--- a/tools/cibuild.py
+++ b/tools/cibuild.py
@@ -4,7 +4,7 @@
 import subprocess
 import sys
 import os.path
-MUON_VERSION = '4.5.30'
+MUON_VERSION = '4.5.31'
 CHROMEDRIVER_VERSION = '2.33'
 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'