diff --git a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/Grok.java b/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/Grok.java
index e72aa948da6..94e5d22fc98 100644
--- a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/Grok.java
+++ b/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/Grok.java
@@ -19,10 +19,6 @@
 
 package org.elasticsearch.ingest.processor.grok;
 
-import java.io.BufferedReader;
-import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
 import java.lang.Object;
 import java.lang.String;
 import java.lang.StringIndexOutOfBoundsException;
@@ -36,7 +32,7 @@ import org.jcodings.specific.UTF8Encoding;
 import org.joni.*;
 import org.joni.exception.ValueException;
 
-public class Grok {
+final class Grok {
 
     private static final String NAME_GROUP = "name";
     private static final String SUBNAME_GROUP = "subname";
diff --git a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokMatchGroup.java b/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokMatchGroup.java
index c070850b7ca..86ddd6974fe 100644
--- a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokMatchGroup.java
+++ b/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokMatchGroup.java
@@ -24,7 +24,7 @@ import java.lang.Integer;
 import java.lang.Object;
 import java.lang.String;
 
-public class GrokMatchGroup {
+final class GrokMatchGroup {
     private static final String DEFAULT_TYPE = "string";
     private final String patternName;
     private final String fieldName;
diff --git a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokProcessor.java b/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokProcessor.java
index 16f9f4ee1a9..87d6e9b4a11 100644
--- a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokProcessor.java
+++ b/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/GrokProcessor.java
@@ -19,16 +19,11 @@
 
 package org.elasticsearch.ingest.processor.grok;
 
-import org.elasticsearch.common.inject.Inject;
-import org.elasticsearch.env.Environment;
 import org.elasticsearch.ingest.Data;
 import org.elasticsearch.ingest.processor.Processor;
 
-import java.io.BufferedReader;
 import java.io.IOException;
 import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.nio.charset.StandardCharsets;
 import java.nio.file.DirectoryStream;
 import java.nio.file.Files;
 import java.nio.file.Path;
diff --git a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/PatternUtils.java b/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/PatternUtils.java
index 7da8060b5fd..05b291d4ea6 100644
--- a/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/PatternUtils.java
+++ b/plugins/ingest/src/main/java/org/elasticsearch/ingest/processor/grok/PatternUtils.java
@@ -25,7 +25,7 @@ import java.io.InputStreamReader;
 import java.nio.charset.StandardCharsets;
 import java.util.Map;
 
-public final class PatternUtils {
+final class PatternUtils {
     private PatternUtils() {}
 
     public static void loadBankFromStream(Map<String, String> patternBank, InputStream inputStream) throws IOException {