diff --git a/tools/build/onos-buck b/tools/build/onos-buck
index 19b7ce0..27f169d 100755
--- a/tools/build/onos-buck
+++ b/tools/build/onos-buck
@@ -5,8 +5,8 @@
 
 set -e
 
-BUCK_URL="http://onlab.vicci.org/onos/third-party/buck-v2017.10.24.01.zip"
-BUCK_SHA="5518ef59c568cc98ad21e0699f1dfd967389e445"
+BUCK_URL="http://onlab.vicci.org/onos/third-party/buck-v2017.11.03.01.zip"
+BUCK_SHA="b228d03e7ee831336e0623a82c8c9a766fbf14fa"
 
 [  "-U" = "$1" ] && shift && FORCE_UPDATE=True
 
diff --git a/tools/dev/bin/patch-yang-libs b/tools/dev/bin/patch-yang-libs
index f04f488..a44613d 100755
--- a/tools/dev/bin/patch-yang-libs
+++ b/tools/dev/bin/patch-yang-libs
@@ -3,7 +3,7 @@
 # Patches lib/BUCK file to use locally built YANG tools.
 # -----------------------------------------------------------------------------
 
-BVER=2.3.0-b2
+BVER=2.3.0-b3
 SVER=2.3-SNAPSHOT
 
 YANG_TOOLS_ROOT=${YANG_TOOLS_ROOT:-~/onos-yang-tools}