elastic · jimczi · Jun 15, 2017 · Jun 15, 2017 · Jun 15, 2017
diff --git a/docs/reference/migration/migrate_6_0/plugins.asciidoc b/docs/reference/migration/migrate_6_0/plugins.asciidoc
@@ -73,3 +73,10 @@ and `cloud.aws.ec2.region`. Instead, specify the full endpoint.
 
 Previous versions of Elasticsearch would skip hidden files and directories when
 scanning the plugins folder. This leniency has been removed.
+
+==== ICU Analysis plugin
+
+The icu4j library has been upgraded to 59.1,
+Indices created in the previous major version will need to be reindexed
+in order to return correct (and correctly ordered) results,
+and to take advantage of new characters.
diff --git a/plugins/analysis-icu/build.gradle b/plugins/analysis-icu/build.gradle
@@ -24,7 +24,7 @@ esplugin {
 
 dependencies {
   compile "org.apache.lucene:lucene-analyzers-icu:${versions.lucene}"
-  compile 'com.ibm.icu:icu4j:56.1'
+  compile 'com.ibm.icu:icu4j:59.1'
 }
 
 dependencyLicenses {

diff --git a/plugins/analysis-icu/licenses/icu4j-56.1.jar.sha1 b/plugins/analysis-icu/licenses/icu4j-56.1.jar.sha1
diff --git a/plugins/analysis-icu/licenses/icu4j-59.1.jar.sha1 b/plugins/analysis-icu/licenses/icu4j-59.1.jar.sha1
@@ -0,0 +1 @@
+6f06e820cf4c8968bbbaae66ae0b33f6a256b57f