diff --git a/gerrit-server/BUCK b/gerrit-server/BUCK
index ec91d4962f..71e88820c6 100644
--- a/gerrit-server/BUCK
+++ b/gerrit-server/BUCK
@@ -59,6 +59,7 @@ java_library(
     '//lib/jgit:jgit-archive',
     '//lib/joda:joda-time',
     '//lib/log:api',
+    '//lib/log:jsonevent-layout',
     '//lib/log:log4j',
     '//lib/lucene:analyzers-common',
     '//lib/lucene:core',
diff --git a/lib/commons/BUCK b/lib/commons/BUCK
index fe249fa356..4c77d9b033 100644
--- a/lib/commons/BUCK
+++ b/lib/commons/BUCK
@@ -41,8 +41,8 @@ maven_jar(
 
 maven_jar(
   name = 'lang',
-  id = 'commons-lang:commons-lang:2.5',
-  sha1 = 'b0236b252e86419eef20c31a44579d2aee2f0a69',
+  id = 'commons-lang:commons-lang:2.6',
+  sha1 = '0ce1edb914c94ebc388f086c6827e8bdeec71ac2',
   license = 'Apache2.0',
   exclude = ['META-INF/LICENSE.txt', 'META-INF/NOTICE.txt'],
 )
diff --git a/lib/log/BUCK b/lib/log/BUCK
index cadc7e7d1c..b332f20e62 100644
--- a/lib/log/BUCK
+++ b/lib/log/BUCK
@@ -31,3 +31,18 @@ maven_jar(
   license = 'Apache2.0',
   exclude = ['META-INF/LICENSE', 'META-INF/NOTICE'],
 )
+
+maven_jar(
+  name = 'jsonevent-layout',
+  id = 'net.logstash.log4j:jsonevent-layout:1.7',
+  sha1 = '507713504f0ddb75ba512f62763519c43cf46fde',
+  license = 'Apache2.0',
+  deps = [':json-smart', '//lib/commons:lang']
+)
+
+maven_jar(
+  name = 'json-smart',
+  id = 'net.minidev:json-smart:1.1.1',
+  sha1 = '24a2f903d25e004de30ac602c5b47f2d4e420a59',
+  license = 'Apache2.0',
+)