diff --git a/pom.xml b/pom.xml
index a4f5cf2..089ef55 100644
--- a/pom.xml
+++ b/pom.xml
@@ -39,6 +39,15 @@
             <artifactId>logback-classic</artifactId>
             <version>1.2.5</version>
         </dependency>
+
+        <!-- APACHE COMMONS -->
+        <dependency>
+            <groupId>org.apache.httpcomponents</groupId>
+            <artifactId>httpclient</artifactId>
+            <version>${commons-httpclient.version}</version>
+        </dependency>
+
+
         <dependency>
             <groupId>xalan</groupId>
             <artifactId>xalan</artifactId>
@@ -111,7 +120,9 @@
         <commons-lang.version>2.6</commons-lang.version>
         <commons-lang3.version>3.11</commons-lang3.version>
         <commons-cli.version>1.4</commons-cli.version>
-        <maven-war-plugin.version>3.0.0</maven-war-plugin.version>
+        <commons-httpclient.version>4.5.13</commons-httpclient.version>
+
+
 
         <!-- UTILS  -->
         <guava.version>30.1.1-jre</guava.version>
@@ -143,6 +154,8 @@
         <exec-maven-plugin.version>3.0.0</exec-maven-plugin.version>
         <maven-surefire-plugin.version>2.21.0</maven-surefire-plugin.version>
         <maven-compiler-plugin.version>3.8.1</maven-compiler-plugin.version>
+        <maven-war-plugin.version>3.0.0</maven-war-plugin.version>
+
     </properties>
 
 </project>
\ No newline at end of file
diff --git a/src/main/java/org/realtor/rets/retsapi/RETSConnection.java b/src/main/java/org/realtor/rets/retsapi/RETSConnection.java
index b2ff47c..b932bc7 100644
--- a/src/main/java/org/realtor/rets/retsapi/RETSConnection.java
+++ b/src/main/java/org/realtor/rets/retsapi/RETSConnection.java
@@ -11,8 +11,9 @@ import org.apache.commons.httpclient.cookie.CookiePolicy;
 import org.apache.commons.httpclient.methods.GetMethod;
 import org.apache.commons.httpclient.methods.PostMethod;
 import org.apache.log4j.BasicConfigurator;
-import org.apache.log4j.Category;
 import org.realtor.rets.util.RETSConfigurator;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.io.*;
 import java.net.URLEncoder;
@@ -27,8 +28,7 @@ import java.util.zip.GZIPInputStream;
  * @version 1.0
  */
 public class RETSConnection extends java.lang.Object {
-    // log4j category
-    static Category cat = Category.getInstance(RETSConnection.class);
+    private final static Logger logger = LoggerFactory.getLogger(RETSConnection.class);
 
     static {
         RETSConfigurator.configure();
diff --git a/src/main/java/org/realtor/rets/retsapi/RETSGetMetadataTransaction.java b/src/main/java/org/realtor/rets/retsapi/RETSGetMetadataTransaction.java
index ae03c9a..71d08bc 100644
--- a/src/main/java/org/realtor/rets/retsapi/RETSGetMetadataTransaction.java
+++ b/src/main/java/org/realtor/rets/retsapi/RETSGetMetadataTransaction.java
@@ -6,14 +6,13 @@
  */
 package org.realtor.rets.retsapi;
 
-
-//import java.util.*;
-import org.apache.log4j.*;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 
 ///////////////////////////////////////////////////////////////////////
 public class RETSGetMetadataTransaction extends RETSTransaction {
-    static Category cat = Category.getInstance(RETSGetMetadataTransaction.class);
+    private final static Logger logger = LoggerFactory.getLogger(RETSConnection.class);
     String version = null;
 
     /**
diff --git a/src/main/java/org/realtor/rets/retsapi/RETSTransaction.java b/src/main/java/org/realtor/rets/retsapi/RETSTransaction.java
index a2876d4..b58de16 100644
--- a/src/main/java/org/realtor/rets/retsapi/RETSTransaction.java
+++ b/src/main/java/org/realtor/rets/retsapi/RETSTransaction.java
@@ -1,26 +1,28 @@
 /**
- *        RETSTransaction.java
+ * RETSTransaction.java
  *
- *        @author        jbrush
- *        @version
+ * @author jbrush
+ * @version
  */
 package org.realtor.rets.retsapi;
 
-import org.apache.log4j.*;
+import org.apache.regexp.RE;
+import org.apache.regexp.RESyntaxException;
+import org.realtor.rets.util.RETSRequestResponse;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
-import org.apache.regexp.*;
-
-import org.realtor.rets.util.*;
-
-import java.io.*;
-
-import java.util.*;
+import java.io.InputStream;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.StringTokenizer;
 
 
 ///////////////////////////////////////////////////////////////////////
 
 public class RETSTransaction extends RETSRequestResponse {
-    static Category cat = Category.getInstance(RETSTransaction.class);
+    private final static Logger logger = LoggerFactory.getLogger(RETSConnection.class);
+
     private static final String STATUS = "status";
     private static final String STATUSTEXT = "statusText";
     private static final String BODY = "body";
@@ -47,7 +49,7 @@ public class RETSTransaction extends RETSRequestResponse {
             firstStatusRE = new RE("<RETS\\s?ReplyCode=\"(.*?)\"\\s?ReplyText=\"(.*?)\"");
             secondStatusRE = new RE("<RETS-STATUS\\s?ReplyCode=\"(.*?)\"\\s?ReplyText=\"(.*?)\"");
         } catch (RESyntaxException e) {
-            cat.error("Error compiling REs", e);
+            logger.error("Error compiling REs", e);
         }
     }
 
@@ -140,7 +142,7 @@ public class RETSTransaction extends RETSRequestResponse {
     public String getUrl() {
         String url = getCapabilityUrl(getRequestType());
 
-        cat.debug("getUrl():" + getRequestType() + " url:" + url);
+        logger.debug("getUrl():" + getRequestType() + " url:" + url);
 
         return url;
     }
@@ -228,22 +230,22 @@ public class RETSTransaction extends RETSRequestResponse {
         // If we have no header map, we obviously have no headers. Also, if
         // there is no list for the header name, we don't have the
         // requested header.
-        if ( headerName != null && headerName.equals("content-type") ) {
+        if (headerName != null && headerName.equals("content-type")) {
             headerName = "Content-Type";
         }
         if (responseHeaderMap != null) {
-            cat.debug("RESPONSEHEADERMAP ==> " + responseHeaderMap.toString());
+            logger.debug("RESPONSEHEADERMAP ==> " + responseHeaderMap.toString());
 //            responseString = (String) responseHeaderMap.get(headerName.toLowerCase());
-            cat.debug("ContentType Class is ... " + responseHeaderMap.get(headerName).getClass().getName());
+            logger.debug("ContentType Class is ... " + responseHeaderMap.get(headerName).getClass().getName());
             Object object = responseHeaderMap.get(headerName);
-            if ( object == null )
+            if (object == null)
                 return null;
-            if ( object instanceof ArrayList ) {
-                responseString = (String) ((ArrayList)object).get(0);
+            if (object instanceof ArrayList) {
+                responseString = (String) ((ArrayList) object).get(0);
             } else
                 responseString = object.toString();
         } else {
-            cat.debug("RESPONSEHEADERMAP ==> " + responseHeaderMap);
+            logger.debug("RESPONSEHEADERMAP ==> " + responseHeaderMap);
         }
         return responseString;
     }
@@ -267,7 +269,7 @@ public class RETSTransaction extends RETSRequestResponse {
     }
 
     static public void log(String logMessage) {
-        cat.debug(logMessage);
+        logger.debug(logMessage);
     }
 }
 
diff --git a/src/main/java/org/realtor/rets/retsapi/RETSUpdateTransaction.java b/src/main/java/org/realtor/rets/retsapi/RETSUpdateTransaction.java
index 7a50290..44e6593 100644
--- a/src/main/java/org/realtor/rets/retsapi/RETSUpdateTransaction.java
+++ b/src/main/java/org/realtor/rets/retsapi/RETSUpdateTransaction.java
@@ -1,28 +1,20 @@
 package org.realtor.rets.retsapi;
 
-import org.apache.log4j.Category;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 import java.util.Iterator;
 import java.util.Map;
-import org.apache.xpath.XPathAPI;
-import org.realtor.rets.util.XMLUtils;
-import org.w3c.dom.Document;
-import org.w3c.dom.Node;
-import org.w3c.dom.NodeList;
-import org.xml.sax.SAXException;
-import java.util.Collections;
-import java.util.Vector;
-import javax.xml.transform.TransformerException;
 
 
 /**
- *        RETSUpdateTransaction.java
+ * RETSUpdateTransaction.java
  *
- *        @author        pobrien
- *        @version 1.0
+ * @author pobrien
+ * @version 1.0
  */
 public class RETSUpdateTransaction extends RETSTransaction {
-    static Category cat = Category.getInstance(RETSUpdateTransaction.class);
+    private final static Logger logger = LoggerFactory.getLogger(RETSConnection.class);
 
     /**
      *
@@ -34,9 +26,9 @@ public class RETSUpdateTransaction extends RETSTransaction {
     }
 
     /**
-     *  Sets the response body for the transaction.
+     * Sets the response body for the transaction.
      *
-     *  @param body body of the transaction
+     * @param body body of the transaction
      */
     public void setResponse(String body) {
         super.setResponse(body);
@@ -44,55 +36,56 @@ public class RETSUpdateTransaction extends RETSTransaction {
         setKeyValuePairs(body);
     }
 
+
     /**
-     *  Sets the type attribute to the string passed in.
+     * Sets the type attribute to the string passed in.
      *
-     *  @param type type attribute value
+     * @param str type attribute value
      */
     public void setType(String str) {
-        cat.debug("set Type=" + str);
+        logger.debug("set Type=" + str);
         setRequestVariable("Type", str);
     }
 
     /**
-     *  Sets the ID attribute to the string passed in.
+     * Sets the ID attribute to the string passed in.
      *
-     *  @param str ID of the object
+     * @param str ID of the object
      */
     public void setValidate(String str) {
-        cat.debug("set Validate=" + str);
+        logger.debug("set Validate=" + str);
         setRequestVariable("Validate", str);
     }
 
     /**
-     *  Sets the location attribute to the string passed in.
+     * Sets the location attribute to the string passed in.
      *
-     *  @param str location attribute value
+     * @param str location attribute value
      */
     public void setDelimiter(String str) {
-        cat.debug("set Delimiter=" + str);
+        logger.debug("set Delimiter=" + str);
         setRequestVariable("Delimiter", str);
     }
 
     public String getDelimiter() {
-	    return getRequestVariable("Delimiter");
+        return getRequestVariable("Delimiter");
     }
 
     public void setRecord(String str) {
-        cat.debug("set Record=" + str);
+        logger.debug("set Record=" + str);
         setRequestVariable("Record", str);
     }
 
     public void setWarningResponse(String str) {
-	        cat.debug("set WarningResponse=" + str);
-	        setRequestVariable("WarningResponse", str);
+        logger.debug("set WarningResponse=" + str);
+        setRequestVariable("WarningResponse", str);
     }
 
     public void setNewValues(Map m) {
         // convert to a string and feed to setRecord()....
         StringBuffer record = new StringBuffer();
         Iterator iter = m.keySet().iterator();
-		// delimiter is a 2 digit HEX value
+        // delimiter is a 2 digit HEX value
         char delim = (char) Integer.parseInt(getDelimiter().trim(), 16);
 
         while (iter.hasNext()) {
@@ -122,36 +115,36 @@ public class RETSUpdateTransaction extends RETSTransaction {
 
 
     public void setWarningResponseValues(Map m) {
-	        // convert to a string and feed to setWarningResponse()....
-	        StringBuffer warning = new StringBuffer("(");
-	        Iterator iter = m.keySet().iterator();
-			// delimiter is a 2 digit HEX value
-	        char delim = (char) Integer.parseInt(getDelimiter().trim(), 16);
+        // convert to a string and feed to setWarningResponse()....
+        StringBuffer warning = new StringBuffer("(");
+        Iterator iter = m.keySet().iterator();
+        // delimiter is a 2 digit HEX value
+        char delim = (char) Integer.parseInt(getDelimiter().trim(), 16);
 
-	        while (iter.hasNext()) {
-	            String name = (String) iter.next();
-	            Object val = m.get(name);
-	            String value = "";
+        while (iter.hasNext()) {
+            String name = (String) iter.next();
+            Object val = m.get(name);
+            String value = "";
 
-	            if (val instanceof String) {
-	                value = (String) val;
-	            } else {
-	                String[] arr = (String[]) val;
-	                value = arr[0];
-	            }
+            if (val instanceof String) {
+                value = (String) val;
+            } else {
+                String[] arr = (String[]) val;
+                value = arr[0];
+            }
 
-	            warning.append(name);
-	            warning.append("=");
-	            warning.append(value);
+            warning.append(name);
+            warning.append("=");
+            warning.append(value);
 
-	            if (iter.hasNext()) {
+            if (iter.hasNext()) {
 
-	                warning.append(delim);
-	            }
-	        }
+                warning.append(delim);
+            }
+        }
 
-	        warning.append(")");
-	        setWarningResponse(warning.toString());
+        warning.append(")");
+        setWarningResponse(warning.toString());
     }
 
     public void setUID(String id) {
@@ -160,7 +153,4 @@ public class RETSUpdateTransaction extends RETSTransaction {
     }
 
 
-
-
-
 }