diff --git a/pom.xml b/pom.xml
index 89c4779..61bcdef 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
     <groupId>com.bellszhu.elasticsearch</groupId>
     <artifactId>elasticsearch-analysis-dynamic-synonym</artifactId>
-    <version>7.5.1</version>
+    <version>7.6.2</version>
     <packaging>jar</packaging>
     <name>elasticsearch-dynamic-synonym</name>
     <description>Analysis-plugin for synonym</description>
diff --git a/src/main/assemblies/plugin.xml b/src/main/assemblies/plugin.xml
index 647e060..1d52715 100644
--- a/src/main/assemblies/plugin.xml
+++ b/src/main/assemblies/plugin.xml
@@ -8,18 +8,18 @@
     <files>
         <file>
             <source>${project.basedir}/src/main/resources/plugin-descriptor.properties</source>
-            <outputDirectory>elasticsearch</outputDirectory>
+            <outputDirectory>/</outputDirectory>
             <filtered>true</filtered>
         </file>
         <file>
             <source>${project.basedir}/src/main/resources/plugin-security.policy</source>
-            <outputDirectory>elasticsearch</outputDirectory>
+            <outputDirectory>/</outputDirectory>
             <filtered>true</filtered>
         </file>
     </files>
     <dependencySets>
         <dependencySet>
-            <outputDirectory>elasticsearch</outputDirectory>
+            <outputDirectory>/</outputDirectory>
             <useProjectArtifact>true</useProjectArtifact>
             <useTransitiveFiltering>true</useTransitiveFiltering>
             <excludes>
@@ -27,7 +27,7 @@
             </excludes>
         </dependencySet>
         <dependencySet>
-            <outputDirectory>elasticsearch</outputDirectory>
+            <outputDirectory>/</outputDirectory>
             <useProjectArtifact>true</useProjectArtifact>
             <useTransitiveFiltering>true</useTransitiveFiltering>
             <includes>
diff --git a/src/main/java/com/bellszhu/elasticsearch/plugin/synonym/analysis/DynamicSynonymFilter.java b/src/main/java/com/bellszhu/elasticsearch/plugin/synonym/analysis/DynamicSynonymFilter.java
index 77fd734..beb0dae 100644
--- a/src/main/java/com/bellszhu/elasticsearch/plugin/synonym/analysis/DynamicSynonymFilter.java
+++ b/src/main/java/com/bellszhu/elasticsearch/plugin/synonym/analysis/DynamicSynonymFilter.java
@@ -197,7 +197,7 @@ private void parse() throws IOException {
         BytesRef pendingOutput = fst.outputs.getNoOutput();
         fst.getFirstArc(scratchArc);
 
-        assert scratchArc.output == fst.outputs.getNoOutput();
+        assert scratchArc.output() == fst.outputs.getNoOutput();
 
         int tokenCount = 0;
 
@@ -263,7 +263,7 @@ private void parse() throws IOException {
 
                 // Accum the output
                 pendingOutput = fst.outputs.add(pendingOutput,
-                        scratchArc.output);
+                        scratchArc.output());
                 bufUpto += Character.charCount(codePoint);
             }
 
@@ -271,7 +271,7 @@ private void parse() throws IOException {
             // state:
             if (scratchArc.isFinal()) {
                 matchOutput = fst.outputs.add(pendingOutput,
-                        scratchArc.nextFinalOutput);
+                        scratchArc.nextFinalOutput());
                 matchInputLength = tokenCount;
                 matchEndOffset = inputEndOffset;
             }
@@ -288,7 +288,7 @@ private void parse() throws IOException {
                 // More matching is possible -- accum the output (if
                 // any) of the WORD_SEP arc:
                 pendingOutput = fst.outputs.add(pendingOutput,
-                        scratchArc.output);
+                        scratchArc.output());
                 if (nextRead == nextWrite) {
                     capture();
                 }
diff --git a/src/main/java/com/bellszhu/elasticsearch/plugin/synonym/analysis/DynamicSynonymTokenFilterFactory.java b/src/main/java/com/bellszhu/elasticsearch/plugin/synonym/analysis/DynamicSynonymTokenFilterFactory.java
index b524867..b47d77c 100644
--- a/src/main/java/com/bellszhu/elasticsearch/plugin/synonym/analysis/DynamicSynonymTokenFilterFactory.java
+++ b/src/main/java/com/bellszhu/elasticsearch/plugin/synonym/analysis/DynamicSynonymTokenFilterFactory.java
@@ -103,6 +103,7 @@ public TokenStream create(TokenStream tokenStream) {
         throw new IllegalStateException("Call getChainAwareTokenFilterFactory to specialize this factory for an analysis chain first");
     }
 
+    @Override
     public TokenFilterFactory getChainAwareTokenFilterFactory(TokenizerFactory tokenizer, List<CharFilterFactory> charFilters,
                                                               List<TokenFilterFactory> previousTokenFilters,
                                                               Function<String, TokenFilterFactory> allFilters) {