diff --git a/config/checkstyle.xml b/config/checkstyle.xml
index a05c12726..041e31ffb 100644
--- a/config/checkstyle.xml
+++ b/config/checkstyle.xml
@@ -89,6 +89,11 @@
 			<property name="message" value="Usage of println"/>
 			<property name="ignoreComments" value="true"/>
 		</module>
+		<module name="RegexpSinglelineJava">
+			<property name="format" value="Boolean\.valueOf\("/>
+			<property name="message" value="Usage Boolean.valueOf(), consider using ParserUtils.parseXmlBoolean() instead (if you want to parse xs:boolean values)"/>
+			<property name="ignoreComments" value="true"/>
+		</module>
 		<module name="RegexpSinglelineJava">
 			<property name="format" value="^\t+"/>
 			<property name="message" value="Indent must not use tab characters. Use space instead."/>
diff --git a/smack-core/src/main/java/org/jivesoftware/smack/provider/IntrospectionProvider.java b/smack-core/src/main/java/org/jivesoftware/smack/provider/IntrospectionProvider.java
index 981b437a5..35dde99b4 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/provider/IntrospectionProvider.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/provider/IntrospectionProvider.java
@@ -123,7 +123,9 @@ public class IntrospectionProvider{
         case "java.lang.String":
             return value;
         case "boolean":
+            // CHECKSTYLE:OFF
             return Boolean.valueOf(value);
+            // CHECKSTYLE:ON
         case "int":
             return Integer.valueOf(value);
         case "long":
diff --git a/smack-core/src/main/java/org/jivesoftware/smack/util/ParserUtils.java b/smack-core/src/main/java/org/jivesoftware/smack/util/ParserUtils.java
index 472ca1ddb..f6d5bdbbd 100644
--- a/smack-core/src/main/java/org/jivesoftware/smack/util/ParserUtils.java
+++ b/smack-core/src/main/java/org/jivesoftware/smack/util/ParserUtils.java
@@ -129,6 +129,27 @@ public class ParserUtils {
         return Resourcepart.from(resourcepartString);
     }
 
+    /**
+     * Prase a string to a boolean value as per "xs:boolean". Valid input strings are "true", "1" for true, and "false", "0" for false.
+     *
+     * @param booleanString the input string.
+     * @return the boolean representation of the input string
+     * @throws IllegalArgumentException if the input string is not valid.
+     * @since 4.3.2
+     */
+    public static boolean parseXmlBoolean(String booleanString) {
+        switch (booleanString) {
+        case "true":
+        case "1":
+            return true;
+        case "false":
+        case "0":
+            return false;
+        default:
+            throw new IllegalArgumentException(booleanString + " is not a valid boolean string");
+        }
+    }
+
     /**
      * Get the boolean value of an argument.
      *
@@ -141,7 +162,7 @@ public class ParserUtils {
         if (valueString == null)
             return null;
         valueString = valueString.toLowerCase(Locale.US);
-        return valueString.equals("true") || valueString.equals("0");
+        return parseXmlBoolean(valueString);
     }
 
     public static boolean getBooleanAttribute(XmlPullParser parser, String name,
diff --git a/smack-experimental/src/main/java/org/jivesoftware/smackx/hoxt/provider/HttpOverXmppReqProvider.java b/smack-experimental/src/main/java/org/jivesoftware/smackx/hoxt/provider/HttpOverXmppReqProvider.java
index 0a69ab4bd..6edf5ca0c 100644
--- a/smack-experimental/src/main/java/org/jivesoftware/smackx/hoxt/provider/HttpOverXmppReqProvider.java
+++ b/smack-experimental/src/main/java/org/jivesoftware/smackx/hoxt/provider/HttpOverXmppReqProvider.java
@@ -16,6 +16,8 @@
  */
 package org.jivesoftware.smackx.hoxt.provider;
 
+import org.jivesoftware.smack.util.ParserUtils;
+
 import org.jivesoftware.smackx.hoxt.packet.HttpMethod;
 import org.jivesoftware.smackx.hoxt.packet.HttpOverXmppReq;
 
@@ -47,13 +49,13 @@ public class HttpOverXmppReqProvider extends AbstractHttpOverXmppProvider<HttpOv
         String jingleStr = parser.getAttributeValue("", AbstractHttpOverXmppProvider.ELEMENT_JINGLE);
 
         if (sipubStr != null) {
-            builder.setSipub(Boolean.valueOf(sipubStr));
+            builder.setSipub(ParserUtils.parseXmlBoolean(sipubStr));
         }
         if (ibbStr != null) {
-            builder.setIbb(Boolean.valueOf(ibbStr));
+            builder.setIbb(ParserUtils.parseXmlBoolean(ibbStr));
         }
         if (jingleStr != null) {
-            builder.setJingle(Boolean.valueOf(jingleStr));
+            builder.setJingle(ParserUtils.parseXmlBoolean(jingleStr));
         }
 
         String maxChunkSize = parser.getAttributeValue("", ATTRIBUTE_MAX_CHUNK_SIZE);
diff --git a/smack-experimental/src/main/java/org/jivesoftware/smackx/iot/control/element/SetBoolData.java b/smack-experimental/src/main/java/org/jivesoftware/smackx/iot/control/element/SetBoolData.java
index de1d27812..a54dd8c4f 100644
--- a/smack-experimental/src/main/java/org/jivesoftware/smackx/iot/control/element/SetBoolData.java
+++ b/smack-experimental/src/main/java/org/jivesoftware/smackx/iot/control/element/SetBoolData.java
@@ -1,6 +1,6 @@
 /**
  *
- * Copyright © 2016 Florian Schmaus
+ * Copyright © 2016-2018 Florian Schmaus
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -16,6 +16,8 @@
  */
 package org.jivesoftware.smackx.iot.control.element;
 
+import org.jivesoftware.smack.util.ParserUtils;
+
 public class SetBoolData extends SetData {
 
     public SetBoolData(String name, boolean value) {
@@ -31,7 +33,7 @@ public class SetBoolData extends SetData {
 
     public Boolean getBooleanValue() {
         if (booleanCache != null) {
-            booleanCache = Boolean.valueOf(getValue());
+            booleanCache = ParserUtils.parseXmlBoolean(getValue());
         }
         return booleanCache;
     }
diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/bookmarks/Bookmarks.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/bookmarks/Bookmarks.java
index 322d0c8bb..f89e40f49 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/bookmarks/Bookmarks.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/bookmarks/Bookmarks.java
@@ -269,12 +269,12 @@ public class Bookmarks implements PrivateData {
 
     private static BookmarkedConference getConferenceStorage(XmlPullParser parser) throws XmlPullParserException, IOException {
         String name = parser.getAttributeValue("", "name");
-        String autojoin = parser.getAttributeValue("", "autojoin");
+        boolean autojoin = ParserUtils.getBooleanAttribute(parser, "autojoin", false);
         EntityBareJid jid = ParserUtils.getBareJidAttribute(parser);
 
         BookmarkedConference conf = new BookmarkedConference(jid);
         conf.setName(name);
-        conf.setAutoJoin(Boolean.valueOf(autojoin));
+        conf.setAutoJoin(autojoin);
 
         // Check for nickname
         boolean done = false;
diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/jiveproperties/provider/JivePropertiesExtensionProvider.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/jiveproperties/provider/JivePropertiesExtensionProvider.java
index b5719be65..178e4ad85 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/jiveproperties/provider/JivePropertiesExtensionProvider.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/jiveproperties/provider/JivePropertiesExtensionProvider.java
@@ -92,7 +92,9 @@ public class JivePropertiesExtensionProvider extends ExtensionElementProvider<Ji
                                 value = Double.valueOf(valueText);
                             }
                             else if ("boolean".equals(type)) {
+                                // CHECKSTYLE:OFF
                                 value = Boolean.valueOf(valueText);
+                                // CHECKSTYLE:ON
                             }
                             else if ("string".equals(type)) {
                                 value = valueText;
diff --git a/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/RoomInfo.java b/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/RoomInfo.java
index b31f5bb4f..421f957f4 100644
--- a/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/RoomInfo.java
+++ b/smack-extensions/src/main/java/org/jivesoftware/smackx/muc/RoomInfo.java
@@ -207,7 +207,8 @@ public class RoomInfo {
 
             FormField subjectmodField = form.getField("muc#roominfo_subjectmod");
             if (subjectmodField != null && !subjectmodField.getValues().isEmpty()) {
-                subjectmod = Boolean.valueOf(subjectmodField.getFirstValue());
+                String firstValue = subjectmodField.getFirstValue();
+                subjectmod = ("true".equals(firstValue) || "1".equals(firstValue));
             }
 
             FormField urlField = form.getField("muc#roominfo_logs");
diff --git a/smack-legacy/src/main/java/org/jivesoftware/smackx/workgroup/settings/WorkgroupProperties.java b/smack-legacy/src/main/java/org/jivesoftware/smackx/workgroup/settings/WorkgroupProperties.java
index 6bd5802b5..16bf54265 100644
--- a/smack-legacy/src/main/java/org/jivesoftware/smackx/workgroup/settings/WorkgroupProperties.java
+++ b/smack-legacy/src/main/java/org/jivesoftware/smackx/workgroup/settings/WorkgroupProperties.java
@@ -104,7 +104,9 @@ public class WorkgroupProperties extends IQ {
             while (!done) {
                 int eventType = parser.next();
                 if (eventType == XmlPullParser.START_TAG && "authRequired".equals(parser.getName())) {
+                    // CHECKSTYLE:OFF
                     props.setAuthRequired(Boolean.valueOf(parser.nextText()).booleanValue());
+                    // CHECKSTYLE:ON
                 }
                 else if (eventType == XmlPullParser.START_TAG && "email".equals(parser.getName())) {
                     props.setEmail(parser.nextText());