diff --git a/lib/gwt/BUCK b/lib/gwt/BUCK
index 394ed92..bd3953a 100644
--- a/lib/gwt/BUCK
+++ b/lib/gwt/BUCK
@@ -1,27 +1,21 @@
 include_defs('//bucklets/maven_jar.bucklet')
 
-VER = '2.7.0'
+VERSION = '2.8.0-rc2'
 
 maven_jar(
   name = 'user',
-  id = 'com.google.gwt:gwt-user:' + VER,
-  sha1 = 'bdc7af42581745d3d79c2efe0b514f432b998a5b',
+  id = 'com.google.gwt:gwt-user:' + VERSION,
+  sha1 = 'ad99b09a626c20cce2bdacf3726a51b2cd16b99e',
   license = 'Apache2.0',
   attach_source = False,
-  deps = [
-    ':javax-validation',
-    ':javax-validation_src',
-  ]
 )
 
 maven_jar(
   name = 'dev',
-  id = 'com.google.gwt:gwt-dev:' + VER,
-  sha1 = 'c2c3dd5baf648a0bb199047a818be5e560f48982',
+  id = 'com.google.gwt:gwt-dev:' + VERSION,
+  sha1 = 'd70a6feb4661c07488090cb81303415e9110b15a',
   license = 'Apache2.0',
   attach_source = False,
-  exclude = ['org/eclipse/jetty/*'],
-  deps = [':json'],
 )
 
 maven_jar(
@@ -30,14 +24,50 @@
   bin_sha1 = 'b6bd7f9d78f6fdaa3c37dae18a4bd298915f328e',
   src_sha1 = '7a561191db2203550fbfa40d534d4997624cd369',
   license = 'Apache2.0',
-  visibility = [],
+  visibility = ['PUBLIC'],
 )
 
 maven_jar(
-  name = 'json',
-  id = 'org.json:json:20140107',
-  sha1 = 'd1ffca6e2482b002702c6a576166fd685e3370e3',
-  license = 'DO_NOT_DISTRIBUTE',
+  name = 'jsinterop-annotations',
+  id = 'com.google.jsinterop:jsinterop-annotations:1.0.0',
+  bin_sha1 = '23c3a3c060ffe4817e67673cc8294e154b0a4a95',
+  src_sha1 = '5d7c478efbfccc191430d7c118d7bd2635e43750',
+  license = 'Apache2.0',
+  visibility = ['PUBLIC'],
+)
+
+maven_jar(
+  name = 'ant',
+  id = 'ant:ant:1.6.5',
+  bin_sha1 = '7d18faf23df1a5c3a43613952e0e8a182664564b',
+  src_sha1 = '9e0a847494563f35f9b02846a1c1eb4aa2ee5a9a',
+  license = 'Apache2.0',
+  visibility = ['PUBLIC'],
+)
+
+maven_jar(
+  name = 'colt',
+  id = 'colt:colt:1.2.0',
   attach_source = False,
-  visibility = [],
+  bin_sha1 = '0abc984f3adc760684d49e0f11ddf167ba516d4f',
+  license = 'DO_NOT_DISTRIBUTE',
+  visibility = ['PUBLIC'],
+)
+
+maven_jar(
+  name = 'tapestry',
+  id = 'tapestry:tapestry:4.0.2',
+  attach_source = False,
+  bin_sha1 = 'e855a807425d522e958cbce8697f21e9d679b1f7',
+  license = 'Apache2.0',
+  visibility = ['PUBLIC'],
+)
+
+maven_jar(
+  name = 'w3c-css-sac',
+  id = 'org.w3c.css:sac:1.3',
+  attach_source = False,
+  bin_sha1 = 'cdb2dcb4e22b83d6b32b93095f644c3462739e82',
+  license = 'DO_NOT_DISTRIBUTE',
+  visibility = ['PUBLIC'],
 )
diff --git a/lib/ow2/BUCK b/lib/ow2/BUCK
index db6c76c..543bc09 100644
--- a/lib/ow2/BUCK
+++ b/lib/ow2/BUCK
@@ -1,32 +1,39 @@
 include_defs('//bucklets/maven_jar.bucklet')
 
-VERSION = '5.0.3'
+VERSION = '5.1'
 
 maven_jar(
   name = 'ow2-asm',
   id = 'org.ow2.asm:asm:' + VERSION,
-  sha1 = 'dcc2193db20e19e1feca8b1240dbbc4e190824fa',
+  sha1 = '5ef31c4fe953b1fd00b8a88fa1d6820e8785bb45',
   license = 'ow2',
 )
 
 maven_jar(
   name = 'ow2-asm-analysis',
   id = 'org.ow2.asm:asm-analysis:' + VERSION,
-  sha1 = 'c7126aded0e8e13fed5f913559a0dd7b770a10f3',
+  sha1 = '6d1bf8989fc7901f868bee3863c44f21aa63d110',
+  license = 'ow2',
+)
+
+maven_jar(
+  name = 'ow2-asm-commons',
+  id = 'org.ow2.asm:asm-commons:' + VERSION,
+  sha1 = '25d8a575034dd9cfcb375a39b5334f0ba9c8474e',
+  deps = [':ow2-asm-tree'],
   license = 'ow2',
 )
 
 maven_jar(
   name = 'ow2-asm-tree',
   id = 'org.ow2.asm:asm-tree:' + VERSION,
-  sha1 = '287749b48ba7162fb67c93a026d690b29f410bed',
+  sha1 = '87b38c12a0ea645791ead9d3e74ae5268d1d6c34',
   license = 'ow2',
 )
 
 maven_jar(
   name = 'ow2-asm-util',
   id = 'org.ow2.asm:asm-util:' + VERSION,
-  sha1 = '1512e5571325854b05fb1efce1db75fcced54389',
+  sha1 = 'b60e33a6bd0d71831e0c249816d01e6c1dd90a47',
   license = 'ow2',
 )
-
diff --git a/pom.xml b/pom.xml
index 353467a..2287a84 100644
--- a/pom.xml
+++ b/pom.xml
@@ -69,7 +69,7 @@
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
         <artifactId>gwt-maven-plugin</artifactId>
-        <version>2.7.0</version>
+        <version>2.8.0-rc2</version>
         <configuration>
           <module>com.googlesource.gerrit.plugins.cookbook.HelloForm</module>
           <disableClassMetadata>true</disableClassMetadata>