diff --git a/README.md b/README.md
index 3857b10..e067bd0 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ Just add it to your dependency then you can use the slf4j module in your applica
   <dependency>
     <groupId>ch.qos.logback</groupId>
     <artifactId>logback-classic</artifactId>
-    <version>1.7.0-JAVA9MODULE_SLF4J17</version>
+    <version>1.7.1-JAVA9MODULE_SLF4J17</version>
   </dependency>
 ```
 
@@ -44,7 +44,7 @@ Just add it to your dependency then you can use the slf4j module in your applica
 
 ### Latest changes
 
-##### Version 1.7.0
+##### Version 1.7.1
 
 * Fix multithreading problem on CloudWatch and KinesisStream LogbackAppender.
 
@@ -75,7 +75,7 @@ Configure your pom.xml:
       <dependency>
         <groupId>com.sndyuk</groupId>
         <artifactId>logback-more-appenders</artifactId>
-        <version>1.7.0</version>
+        <version>1.7.1</version>
       </dependency>
 
       <!-- [Optional] If you use The CloudWatch appender, You need to add the dependency(aws-java-sdk-logs). -->
diff --git a/pom-JAVA9MODULE_SLF4J17.xml b/pom-JAVA9MODULE_SLF4J17.xml
index 33d6975..17e7252 100644
--- a/pom-JAVA9MODULE_SLF4J17.xml
+++ b/pom-JAVA9MODULE_SLF4J17.xml
@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.sndyuk</groupId>
   <artifactId>logback-more-appenders</artifactId>
-  <version>1.7.0-JAVA9MODULE_SLF4J17</version>
+  <version>1.7.1-JAVA9MODULE_SLF4J17</version>
   <name>logback-more-appenders</name>
   <description>logback appenders.</description>
   <url>https://github.com/sndyuk/logback-more-appenders</url>
diff --git a/pom.xml b/pom.xml
index 7568370..84a977e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -2,7 +2,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.sndyuk</groupId>
   <artifactId>logback-more-appenders</artifactId>
-  <version>1.7.0</version>
+  <version>1.7.1</version>
   <name>logback-more-appenders</name>
   <description>logback appenders.</description>
   <url>https://github.com/sndyuk/logback-more-appenders</url>
@@ -59,7 +59,7 @@
           <source>${jdk.version}</source>
           <target>${jdk.version}</target>
           <excludes>
-            <exclude>module-info.java</exclude>
+            <exclude>**/module-info.java</exclude>
           </excludes>
         </configuration>
       </plugin>
@@ -90,6 +90,9 @@
         </executions>
         <configuration>
           <additionalparam>-Xdoclint:none</additionalparam>
+          <sourceFileExcludes>
+            <sourceFileExclude>**/module-info.java</sourceFileExclude>
+          </sourceFileExcludes>
         </configuration>
       </plugin>
       <plugin>
diff --git a/src/main/java/ch/qos/logback/more/appenders/AwsAppender.java b/src/main/java/ch/qos/logback/more/appenders/AwsAppender.java
index 3513946..415fdad 100644
--- a/src/main/java/ch/qos/logback/more/appenders/AwsAppender.java
+++ b/src/main/java/ch/qos/logback/more/appenders/AwsAppender.java
@@ -15,6 +15,7 @@
 
 import ch.qos.logback.core.UnsynchronizedAppenderBase;
 import com.amazonaws.auth.AWSCredentials;
+import com.amazonaws.auth.AWSCredentialsProvider;
 import com.amazonaws.auth.DefaultAWSCredentialsProviderChain;
 import com.amazonaws.auth.PropertiesCredentials;
 import com.amazonaws.auth.profile.ProfileCredentialsProvider;
@@ -23,6 +24,7 @@
 public abstract class AwsAppender<E> extends UnsynchronizedAppenderBase<E> {
 
     protected AwsConfig config;
+    protected AWSCredentialsProvider credentialsProvider;
     protected AWSCredentials credentials;
 
     @Override
@@ -34,9 +36,9 @@ public void start() {
                 this.credentials = new PropertiesCredentials(getClass().getClassLoader()
                   .getResourceAsStream(config.getCredentialFilePath()));
             } else if (config.getProfile() != null && config.getProfile().length() > 0) {
-                this.credentials = new ProfileCredentialsProvider(config.getProfile()).getCredentials();
+                this.credentialsProvider = new ProfileCredentialsProvider(config.getProfile());
             } else {
-                this.credentials = DefaultAWSCredentialsProviderChain.getInstance().getCredentials();
+                this.credentialsProvider = DefaultAWSCredentialsProviderChain.getInstance();
             }
         } catch (Exception e) {
             addWarn("Could not initialize " + AwsAppender.class.getCanonicalName()
diff --git a/src/main/java/ch/qos/logback/more/appenders/CloudWatchLogbackAppender.java b/src/main/java/ch/qos/logback/more/appenders/CloudWatchLogbackAppender.java
index b3cd366..193bf4f 100644
--- a/src/main/java/ch/qos/logback/more/appenders/CloudWatchLogbackAppender.java
+++ b/src/main/java/ch/qos/logback/more/appenders/CloudWatchLogbackAppender.java
@@ -13,19 +13,19 @@
  */
 package ch.qos.logback.more.appenders;
 
-import java.util.Collections;
-import java.util.List;
-import java.util.UUID;
+import ch.qos.logback.core.encoder.EchoEncoder;
+import ch.qos.logback.core.encoder.Encoder;
+import ch.qos.logback.more.appenders.IntervalEmitter.EventMapper;
+import ch.qos.logback.more.appenders.IntervalEmitter.IntervalAppender;
 import com.amazonaws.auth.AWSStaticCredentialsProvider;
 import com.amazonaws.client.builder.AwsClientBuilder;
 import com.amazonaws.services.logs.AWSLogs;
 import com.amazonaws.services.logs.AWSLogsClientBuilder;
 import com.amazonaws.services.logs.model.*;
-import ch.qos.logback.classic.spi.ILoggingEvent;
-import ch.qos.logback.core.encoder.EchoEncoder;
-import ch.qos.logback.core.encoder.Encoder;
-import ch.qos.logback.more.appenders.IntervalEmitter.EventMapper;
-import ch.qos.logback.more.appenders.IntervalEmitter.IntervalAppender;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.UUID;
 
 /**
  * Appender for CloudWatch. It appends logs for every emitInterval.
@@ -107,10 +107,13 @@ protected void append(E eventObject) {
 
     private void ensureLogGroup() {
         if (this.awsLogs == null) {
-            this.awsLogs = AWSLogsClientBuilder.standard()
-              .withCredentials(new AWSStaticCredentialsProvider(credentials))
-              .withRegion(config.getRegion())
-            .build();
+             AWSLogsClientBuilder builder = AWSLogsClientBuilder.standard().withRegion(config.getRegion());
+            if (credentials != null) {
+                builder.withCredentials(new AWSStaticCredentialsProvider(credentials));
+            } else if (credentialsProvider != null) {
+                builder.withCredentials(credentialsProvider);
+            }
+            this.awsLogs = builder.build();
         }
         DescribeLogGroupsRequest request = new DescribeLogGroupsRequest().withLogGroupNamePrefix(logGroupName).withLimit(1);
         DescribeLogGroupsResult result = awsLogs.describeLogGroups(request);