diff --git a/pom.xml b/pom.xml
index c7fddfe9..164cc03d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -3,7 +3,7 @@
     <groupId>org.owasp.antisamy</groupId>
     <artifactId>antisamy</artifactId>
     <packaging>jar</packaging>
-    <version>1.6.6-dev</version>
+    <version>1.6.6</version>
     <distributionManagement>
         <snapshotRepository>
             <id>ossrh</id>
@@ -42,7 +42,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <project.build.outputTimestamp>2022-01-31T23:13:00Z</project.build.outputTimestamp>
+        <project.build.outputTimestamp>2022-04-21T21:46:00Z</project.build.outputTimestamp>
         <gpg.skip>true</gpg.skip><!-- by default skip gpg -->
         <version.io>2.11.0</version.io>
         <version.slf4j>1.7.36</version.slf4j>
@@ -69,6 +69,13 @@
             <groupId>org.apache.httpcomponents.client5</groupId>
             <artifactId>httpclient5</artifactId>
             <version>5.1.3</version>
+            <exclusions>
+                <!-- exclude this old version of slf4j-api as newer can be used -->
+                <exclusion>
+                    <groupId>org.slf4j</groupId>
+                    <artifactId>slf4j-api</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.apache.httpcomponents.core5</groupId>
diff --git a/src/main/java/org/owasp/validator/css/CssScanner.java b/src/main/java/org/owasp/validator/css/CssScanner.java
index 279597ba..e357a70d 100644
--- a/src/main/java/org/owasp/validator/css/CssScanner.java
+++ b/src/main/java/org/owasp/validator/css/CssScanner.java
@@ -333,7 +333,7 @@ public String handleResponse(
                 try {
                     String responseBody = httpClient.execute(new HttpGet(stylesheetUri), responseHandler);
                     // pull down stylesheet, observing size limit
-                    stylesheet = responseBody.getBytes();
+                    stylesheet = responseBody.getBytes(Charset.forName("UTF8"));
                     if (stylesheet != null && stylesheet.length > sizeLimit) {
                         errorMessages.add(ErrorMessageUtil.getMessage(
                                 messages,
diff --git a/src/main/java/org/owasp/validator/html/CleanResults.java b/src/main/java/org/owasp/validator/html/CleanResults.java
index ffa0a381..ac38c3b1 100644
--- a/src/main/java/org/owasp/validator/html/CleanResults.java
+++ b/src/main/java/org/owasp/validator/html/CleanResults.java
@@ -98,7 +98,8 @@ public CleanResults(long startOfScan, Callable<String> cleanHTML,
 
 	/**
 	 * Return the DOM version of the clean HTML.
-	 * return The XML Document fragment version of the clean HTML produced during the sanitization process.
+	 *
+	 * @return The XML Document fragment version of the clean HTML produced during the sanitization process.
 	 *        This may be null, even if the clean HTML String is not null.
 	 */
 	public DocumentFragment getCleanXMLDocumentFragment() {
diff --git a/src/main/java/org/owasp/validator/html/InternalPolicy.java b/src/main/java/org/owasp/validator/html/InternalPolicy.java
index 863367eb..61ac87dd 100644
--- a/src/main/java/org/owasp/validator/html/InternalPolicy.java
+++ b/src/main/java/org/owasp/validator/html/InternalPolicy.java
@@ -132,7 +132,11 @@ public boolean isOmitXmlDeclaration() {
         return omitXmlDeclaration;
     }
 
-    /** @deprecated XHTML usage will go away in AntiSamy 1.7+ */
+    /**
+     * @deprecated XHTML usage will go away in AntiSamy 1.7+
+     *
+     * @return true if useXhtml is set for this policy. False otherwise.
+     */
     @Deprecated
     public boolean isUseXhtml() {
         return useXhtml;
diff --git a/src/main/java/org/owasp/validator/html/scan/AntiSamyDOMScanner.java b/src/main/java/org/owasp/validator/html/scan/AntiSamyDOMScanner.java
index a2ed7397..dc991c46 100644
--- a/src/main/java/org/owasp/validator/html/scan/AntiSamyDOMScanner.java
+++ b/src/main/java/org/owasp/validator/html/scan/AntiSamyDOMScanner.java
@@ -408,17 +408,17 @@ private boolean processStyleTag(Element ele, Node parentNode) {
 
         try {
             if (ele.getChildNodes().getLength() > 0) {
-                String toScan = "";
+                StringBuffer toScan = new StringBuffer();
 
                 for (int i = 0; i < ele.getChildNodes().getLength(); i++) {
                     Node childNode = ele.getChildNodes().item(i);
-                    if (!toScan.isEmpty()){
-                        toScan += "\n";
+                    if (toScan.length() > 0) {
+                        toScan.append("\n");
                     }
-                    toScan += childNode.getTextContent();
+                    toScan.append(childNode.getTextContent());
                 }
 
-                CleanResults cr = styleScanner.scanStyleSheet(toScan, policy.getMaxInputSize());
+                CleanResults cr = styleScanner.scanStyleSheet(toScan.toString(), policy.getMaxInputSize());
                 errorMessages.addAll(cr.getErrorMessages());
 
                 /*