diff --git a/shield/src/main/java/org/elasticsearch/shield/action/authc/cache/TransportClearRealmCacheAction.java b/shield/src/main/java/org/elasticsearch/shield/action/authc/cache/TransportClearRealmCacheAction.java
index 31f754865be..dd146f64bff 100644
--- a/shield/src/main/java/org/elasticsearch/shield/action/authc/cache/TransportClearRealmCacheAction.java
+++ b/shield/src/main/java/org/elasticsearch/shield/action/authc/cache/TransportClearRealmCacheAction.java
@@ -5,7 +5,6 @@
  */
 package org.elasticsearch.shield.action.authc.cache;
 
-import com.google.common.collect.Lists;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.support.ActionFilters;
 import org.elasticsearch.action.support.nodes.TransportNodesAction;
@@ -20,6 +19,7 @@ import org.elasticsearch.shield.authc.support.CachingUsernamePasswordRealm;
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 
+import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicReferenceArray;
 
@@ -42,7 +42,7 @@ public class TransportClearRealmCacheAction extends TransportNodesAction<ClearRe
 
     @Override
     protected ClearRealmCacheResponse newResponse(ClearRealmCacheRequest request, AtomicReferenceArray responses) {
-        final List<ClearRealmCacheResponse.Node> nodes = Lists.newArrayList();
+        final List<ClearRealmCacheResponse.Node> nodes = new ArrayList<>();
         for (int i = 0; i < responses.length(); i++) {
             Object resp = responses.get(i);
             if (resp instanceof ClearRealmCacheResponse.Node) {
diff --git a/shield/src/main/java/org/elasticsearch/shield/authc/Realms.java b/shield/src/main/java/org/elasticsearch/shield/authc/Realms.java
index 1e6969544c8..0a6433f2067 100644
--- a/shield/src/main/java/org/elasticsearch/shield/authc/Realms.java
+++ b/shield/src/main/java/org/elasticsearch/shield/authc/Realms.java
@@ -5,7 +5,6 @@
  */
 package org.elasticsearch.shield.authc;
 
-import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.common.component.AbstractLifecycleComponent;
@@ -69,7 +68,7 @@ public class Realms extends AbstractLifecycleComponent<Realms> implements Iterab
     protected List<Realm> initRealms() {
         Settings realmsSettings = settings.getAsSettings("shield.authc.realms");
         Set<String> internalTypes = Sets.newHashSet();
-        List<Realm> realms = Lists.newArrayList();
+        List<Realm> realms = new ArrayList<>();
         for (String name : realmsSettings.names()) {
             Settings realmSettings = realmsSettings.getAsSettings(name);
             String type = realmSettings.get("type");
diff --git a/shield/src/main/java/org/elasticsearch/shield/authc/esusers/tool/ESUsersTool.java b/shield/src/main/java/org/elasticsearch/shield/authc/esusers/tool/ESUsersTool.java
index 41286309bb8..62c8504a680 100644
--- a/shield/src/main/java/org/elasticsearch/shield/authc/esusers/tool/ESUsersTool.java
+++ b/shield/src/main/java/org/elasticsearch/shield/authc/esusers/tool/ESUsersTool.java
@@ -381,7 +381,7 @@ public class ESUsersTool extends CliTool {
             Path file = FileUserRolesStore.resolveFile(esusersSettings, env);
             Map<String, String[]> userRoles = FileUserRolesStore.parseFile(file, null);
 
-            List<String> roles = Lists.newArrayList();
+            List<String> roles = new ArrayList<>();
             if (userRoles.get(username) != null) {
                 roles.addAll(Arrays.asList(userRoles.get(username)));
             }
diff --git a/shield/src/main/java/org/elasticsearch/shield/authz/indicesresolver/DefaultIndicesAndAliasesResolver.java b/shield/src/main/java/org/elasticsearch/shield/authz/indicesresolver/DefaultIndicesAndAliasesResolver.java
index b933b062b33..e233bf9c729 100644
--- a/shield/src/main/java/org/elasticsearch/shield/authz/indicesresolver/DefaultIndicesAndAliasesResolver.java
+++ b/shield/src/main/java/org/elasticsearch/shield/authz/indicesresolver/DefaultIndicesAndAliasesResolver.java
@@ -6,7 +6,6 @@
 package org.elasticsearch.shield.authz.indicesresolver;
 
 import com.google.common.collect.ImmutableList;
-import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
 import org.elasticsearch.action.AliasesRequest;
 import org.elasticsearch.action.CompositeIndicesRequest;
@@ -98,7 +97,7 @@ public class DefaultIndicesAndAliasesResolver implements IndicesAndAliasesResolv
     }
 
     private List<String> loadAuthorizedAliases(List<String> authorizedIndices, MetaData metaData) {
-        List<String> authorizedAliases = Lists.newArrayList();
+        List<String> authorizedAliases = new ArrayList<>();
         SortedMap<String, AliasOrIndex> existingAliases = metaData.getAliasAndIndexLookup();
         for (String authorizedIndex : authorizedIndices) {
             AliasOrIndex aliasOrIndex = existingAliases.get(authorizedIndex);
@@ -110,7 +109,7 @@ public class DefaultIndicesAndAliasesResolver implements IndicesAndAliasesResolv
     }
 
     private List<String> replaceWildcardsWithAuthorizedAliases(String[] aliases, List<String> authorizedAliases) {
-        List<String> finalAliases = Lists.newArrayList();
+        List<String> finalAliases = new ArrayList<>();
 
         //IndicesAliasesRequest doesn't support empty aliases (validation fails) but GetAliasesRequest does (in which case empty means _all)
         boolean matchAllAliases = aliases.length == 0;