diff --git a/CHANGELOG.md b/CHANGELOG.md
index faa4afb..9335fd5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,10 +2,14 @@
 The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
-## 4.0.1 (UNRELEASED)
+## 4.1.0 (09/23/2026)
+#### Feature Changes
+- [https://github.com/Crim/pardot-java-client/issues/108](Issue-108) Salesforce SSO: Add support for Client Credentials Flow, Thanks for the contribution [FlipWarthog](https://github.com/FlipWarthog)!
+
 #### Internal Dependency Updates
-- Upgraded Jackson from version 2.11.4 to 2.13.2.
+- Upgraded Jackson from version 2.11.4 to 2.22.2.
 - Upgraded slf4j from version 1.7.30 to 1.7.36.
+- Upgraded log4j2 from version 2.17.2 to 2.26.1 (used by tests only).
 
 
 ## 4.0.0 (06/03/2021)
@@ -208,4 +212,4 @@ the library prior to October 31st 2018.
 - Add support for List and ListMembership API endpoints.
 
 ## 0.1.0 (08/15/2017)
-- Initial release!
\ No newline at end of file
+- Initial release!
diff --git a/README.md b/README.md
index b62be56..81f222a 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ This client library is released on Maven Central.  Add a new dependency to your
 <dependency>
     <groupId>com.darksci</groupId>
     <artifactId>pardot-api-client</artifactId>
-    <version>4.0.0</version>
+    <version>4.1.0</version>
 </dependency>
 ```
 
@@ -50,6 +50,17 @@ final ConfigurationBuilder configuration = Configuration.newBuilder()
         "YourPardotBusinessUnitId"
     );
 
+/*
+ * If you want to use the client_credentials authentication flow:
+ */
+Configuration.newBuilder()
+    // This configures the client using the 'Client Credentials' authentication flow.    
+    .withSsoLogin(
+        "YourConnectedAppClientId",
+        "YourConnectedAppClientSecret",
+        "YourPardotBusinessUnitId"
+    );
+
 /*
  * Alternatively, if you want to use the authorization_code authentication flow,
  * you can configure the client using a previously acquired refresh_token:
@@ -284,6 +295,7 @@ user friendly Plain Old Java Objects (POJOs).
 [Crim](https://github.com/crim)
 [LoRez](https://github.com/lorez)
 [dai-00](https://github.com/dai-00)
+[FlipWarthog](https://github.com/FlipWarthog)
 
 ## Releasing
 Steps for performing a release:
diff --git a/pom.xml b/pom.xml
index 7314faf..7aa9751 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>com.darksci</groupId>
     <artifactId>pardot-api-client</artifactId>
-    <version>4.0.1</version>
+    <version>4.1.0</version>
     <packaging>jar</packaging>
 
     <!-- Require Maven 3.5.0 -->
@@ -47,7 +47,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
         <!-- Jackson version -->
-        <jackson.version>2.13.2</jackson.version>
+        <jackson.version>2.22.2</jackson.version>
 
         <!-- Define which version of junit you'll be running -->
         <junit.version>4.13.2</junit.version>
@@ -58,7 +58,7 @@
         <checkstyle.version>8.29</checkstyle.version>
 
         <!-- Log4J Version -->
-        <log4j2.version>2.17.2</log4j2.version>
+        <log4j2.version>2.26.1</log4j2.version>
         <slf4j.version>1.7.36</slf4j.version>
 
         <!-- test toggling -->
@@ -363,4 +363,4 @@
             </build>
         </profile>
     </profiles>
-</project>
\ No newline at end of file
+</project>
diff --git a/src/main/java/com/darksci/pardot/api/parser/JacksonFactory.java b/src/main/java/com/darksci/pardot/api/parser/JacksonFactory.java
index c971f14..4a83577 100644
--- a/src/main/java/com/darksci/pardot/api/parser/JacksonFactory.java
+++ b/src/main/java/com/darksci/pardot/api/parser/JacksonFactory.java
@@ -20,7 +20,7 @@
 import com.darksci.pardot.api.parser.prospect.ProspectCustomFieldDeserializer;
 import com.darksci.pardot.api.response.customfield.ProspectCustomFieldValue;
 import com.fasterxml.jackson.databind.DeserializationFeature;
-import com.fasterxml.jackson.databind.PropertyNamingStrategy;
+import com.fasterxml.jackson.databind.PropertyNamingStrategies;
 import com.fasterxml.jackson.databind.json.JsonMapper;
 import com.fasterxml.jackson.dataformat.xml.JacksonXmlModule;
 import com.fasterxml.jackson.dataformat.xml.XmlMapper;
@@ -73,7 +73,7 @@ public static XmlMapper newInstance() {
         // Configure it
         mapper
             .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false)
-            .setPropertyNamingStrategy(PropertyNamingStrategy.SNAKE_CASE)
+            .setPropertyNamingStrategy(PropertyNamingStrategies.SNAKE_CASE)
             .registerModule(new JodaModule())
             .setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));