diff --git a/jenkins_jobs/modules/builders.py b/jenkins_jobs/modules/builders.py
index 0a3765ba8..b54cfff28 100644
--- a/jenkins_jobs/modules/builders.py
+++ b/jenkins_jobs/modules/builders.py
@@ -152,10 +152,10 @@ def copyartifact(parser, xml_parent, data):
         XML.SubElement(selector, 'buildNumber').text = data['build-number']
     if select == 'last-successful':
         XML.SubElement(selector, 'stable').text = str(
-            data.get('stable', 'false')).lower()
+            data.get('stable', False)).lower()
     if select == 'upstream-build':
         XML.SubElement(selector, 'fallbackToLastSuccessful').text = str(
-            data.get('fallback-to-last-successful', 'false')).lower()
+            data.get('fallback-to-last-successful', False)).lower()
     if select == 'permalink':
         XML.SubElement(selector, 'id').text = permalinkdict[permalink]
     if select == 'build-param':
@@ -914,19 +914,19 @@ def grails(parser, xml_parent, data):
     XML.SubElement(grails, 'properties').text = data.get(
         'properties', '')
     XML.SubElement(grails, 'forceUpgrade').text = str(
-        data.get('force-upgrade', 'false')).lower()
+        data.get('force-upgrade', False)).lower()
     XML.SubElement(grails, 'nonInteractive').text = str(
-        data.get('non-interactive', 'false')).lower()
+        data.get('non-interactive', False)).lower()
     XML.SubElement(grails, 'useWrapper').text = str(
-        data.get('use-wrapper', 'false')).lower()
+        data.get('use-wrapper', False)).lower()
     XML.SubElement(grails, 'plainOutput').text = str(
-        data.get('plain-output', 'false')).lower()
+        data.get('plain-output', False)).lower()
     XML.SubElement(grails, 'stackTrace').text = str(
-        data.get('stack-trace', 'false')).lower()
+        data.get('stack-trace', False)).lower()
     XML.SubElement(grails, 'verbose').text = str(
-        data.get('verbose', 'false')).lower()
+        data.get('verbose', False)).lower()
     XML.SubElement(grails, 'refreshDependencies').text = str(
-        data.get('refresh-dependencies', 'false')).lower()
+        data.get('refresh-dependencies', False)).lower()
 
 
 class Builders(jenkins_jobs.modules.base.Base):
diff --git a/jenkins_jobs/modules/hipchat_notif.py b/jenkins_jobs/modules/hipchat_notif.py
index cdc1e9cc8..988ca4c87 100644
--- a/jenkins_jobs/modules/hipchat_notif.py
+++ b/jenkins_jobs/modules/hipchat_notif.py
@@ -97,7 +97,7 @@ class HipChat(jenkins_jobs.modules.base.Base):
                                  'HipChatNotifier_-HipChatJobProperty')
         XML.SubElement(pdefhip, 'room').text = hipchat['room']
         XML.SubElement(pdefhip, 'startNotification').text = str(
-            hipchat.get('start-notify', 'false')).lower()
+            hipchat.get('start-notify', False)).lower()
 
         publishers = xml_parent.find('publishers')
         if publishers is None:
diff --git a/jenkins_jobs/modules/parameters.py b/jenkins_jobs/modules/parameters.py
index 83c912c31..e243b9bb6 100644
--- a/jenkins_jobs/modules/parameters.py
+++ b/jenkins_jobs/modules/parameters.py
@@ -106,7 +106,7 @@ def bool_param(parser, xml_parent, data):
             default: false
             description: "A parameter named FOO, defaults to 'false'."
     """
-    data['default'] = str(data.get('default', 'false')).lower()
+    data['default'] = str(data.get('default', False)).lower()
     base_param(parser, xml_parent, data, True,
                'hudson.model.BooleanParameterDefinition')
 
diff --git a/jenkins_jobs/modules/project_matrix.py b/jenkins_jobs/modules/project_matrix.py
index 030f09be9..b1ae09c92 100644
--- a/jenkins_jobs/modules/project_matrix.py
+++ b/jenkins_jobs/modules/project_matrix.py
@@ -115,7 +115,7 @@ class Matrix(jenkins_jobs.modules.base.Base):
         XML.SubElement(root, 'combinationFilter').text = \
             str(ex_d.get('combination-filter', '')).rstrip()
         XML.SubElement(ex_r, 'runSequentially').text = \
-            str(ex_d.get('sequential', 'false')).lower()
+            str(ex_d.get('sequential', False)).lower()
         if 'touchstone' in ex_d:
             XML.SubElement(ex_r, 'touchStoneCombinationFilter').text = \
                 str(ex_d['touchstone'].get('expr', ''))
diff --git a/jenkins_jobs/modules/project_maven.py b/jenkins_jobs/modules/project_maven.py
index d83c94391..915e79dbd 100644
--- a/jenkins_jobs/modules/project_maven.py
+++ b/jenkins_jobs/modules/project_maven.py
@@ -79,7 +79,7 @@ class Maven(jenkins_jobs.modules.base.Base):
             XML.SubElement(xml_parent, 'mavenName').text = maven_name
 
         XML.SubElement(xml_parent, 'ignoreUpstremChanges').text = str(
-            data['maven'].get('ignore-upstream-changes', 'true')).lower()
+            data['maven'].get('ignore-upstream-changes', True)).lower()
 
         XML.SubElement(xml_parent, 'rootPOM').text = \
             data['maven'].get('root-pom', 'pom.xml')
diff --git a/jenkins_jobs/modules/properties.py b/jenkins_jobs/modules/properties.py
index 1989331ac..b442ad5a6 100644
--- a/jenkins_jobs/modules/properties.py
+++ b/jenkins_jobs/modules/properties.py
@@ -167,13 +167,13 @@ def inject(parser, xml_parent, data):
         info, 'groovyScriptContent', data.get('groovy-content'))
 
     XML.SubElement(info, 'loadFilesFromMaster').text = str(
-        data.get('load-from-master', 'false')).lower()
+        data.get('load-from-master', False)).lower()
     XML.SubElement(inject, 'on').text = str(
-        data.get('enabled', 'true')).lower()
+        data.get('enabled', True)).lower()
     XML.SubElement(inject, 'keepJenkinsSystemVariables').text = str(
-        data.get('keep-system-variables', 'true')).lower()
+        data.get('keep-system-variables', True)).lower()
     XML.SubElement(inject, 'keepBuildVariables').text = str(
-        data.get('keep-build-variables', 'true')).lower()
+        data.get('keep-build-variables', True)).lower()
 
 
 def authenticated_build(parser, xml_parent, data):
@@ -306,7 +306,7 @@ def extended_choice(parser, xml_parent, data):
     XML.SubElement(extended, 'name').text = data['name']
     XML.SubElement(extended, 'description').text = data.get('description', '')
     XML.SubElement(extended, 'quoteValue').text = str(data.get('quote-value',
-                                                      'false')).lower()
+                                                      False)).lower()
     XML.SubElement(extended, 'visibleItemCount').text = data.get(
         'visible-items', '5')
     choice = data.get('type', 'single-select')
diff --git a/jenkins_jobs/modules/publishers.py b/jenkins_jobs/modules/publishers.py
index 55c432a26..05aac58a0 100644
--- a/jenkins_jobs/modules/publishers.py
+++ b/jenkins_jobs/modules/publishers.py
@@ -348,19 +348,19 @@ def cobertura(parser, xml_parent, data):
     XML.SubElement(cobertura, 'coberturaReportFile').text = data.get(
         'report-file', '**/coverage.xml')
     XML.SubElement(cobertura, 'onlyStable').text = str(
-        data.get('only-stable', 'false')).lower()
+        data.get('only-stable', False)).lower()
     XML.SubElement(cobertura, 'failUnhealthy').text = str(
-        data.get('fail-unhealthy', 'false')).lower()
+        data.get('fail-unhealthy', False)).lower()
     XML.SubElement(cobertura, 'failUnstable').text = str(
-        data.get('fail-unstable', 'false')).lower()
+        data.get('fail-unstable', False)).lower()
     XML.SubElement(cobertura, 'autoUpdateHealth').text = str(
-        data.get('health-auto-update', 'false')).lower()
+        data.get('health-auto-update', False)).lower()
     XML.SubElement(cobertura, 'autoUpdateStability').text = str(
-        data.get('stability-auto-update', 'false')).lower()
+        data.get('stability-auto-update', False)).lower()
     XML.SubElement(cobertura, 'zoomCoverageChart').text = str(
-        data.get('zoom-coverage-chart', 'false')).lower()
+        data.get('zoom-coverage-chart', False)).lower()
     XML.SubElement(cobertura, 'failNoReports').text = str(
-        data.get('fail-no-reports', 'false')).lower()
+        data.get('fail-no-reports', False)).lower()
     healthy = XML.SubElement(cobertura, 'healthyTarget')
     targets = XML.SubElement(healthy, 'targets', {
         'class': 'enum-map',
@@ -567,13 +567,13 @@ def xunit(parser, xml_parent, data):
             supported_type[framework_name].get('pattern', '')
         XML.SubElement(xmlframework, 'failIfNotNew').text = \
             str(supported_type[framework_name].get(
-                'requireupdate', 'true')).lower()
+                'requireupdate', True)).lower()
         XML.SubElement(xmlframework, 'deleteOutputFiles').text = \
             str(supported_type[framework_name].get(
-                'deleteoutput', 'true')).lower()
+                'deleteoutput', True)).lower()
         XML.SubElement(xmlframework, 'stopProcessingIfError').text = \
             str(supported_type[framework_name].get(
-                'stoponerror', 'true')).lower()
+                'stoponerror', True)).lower()
 
     xmlthresholds = XML.SubElement(xunit, 'thresholds')
     if 'thresholds' in data:
@@ -1189,7 +1189,7 @@ def cppcheck(parser, xml_parent, data):
     cppext = XML.SubElement(cppextbase, 'cppcheckConfig')
     XML.SubElement(cppext, 'pattern').text = data['pattern']
     XML.SubElement(cppext, 'ignoreBlankFiles').text = \
-        str(data.get('ignoreblankfiles', 'false')).lower()
+        str(data.get('ignoreblankfiles', False)).lower()
 
     csev = XML.SubElement(cppext, 'configSeverityEvaluation')
     thrsh = data.get('thresholds', {})
@@ -1205,15 +1205,15 @@ def cppcheck(parser, xml_parent, data):
 
     sev = thrsh.get('severity', {})
     XML.SubElement(csev, 'severityError').text = \
-        str(sev.get('error', 'true')).lower()
+        str(sev.get('error', True)).lower()
     XML.SubElement(csev, 'severityWarning').text = \
-        str(sev.get('warning', 'true')).lower()
+        str(sev.get('warning', True)).lower()
     XML.SubElement(csev, 'severityStyle').text = \
-        str(sev.get('style', 'true')).lower()
+        str(sev.get('style', True)).lower()
     XML.SubElement(csev, 'severityPerformance').text = \
-        str(sev.get('performance', 'true')).lower()
+        str(sev.get('performance', True)).lower()
     XML.SubElement(csev, 'severityInformation').text = \
-        str(sev.get('information', 'true')).lower()
+        str(sev.get('information', True)).lower()
 
     graph = data.get('graph', {})
     cgraph = XML.SubElement(cppext, 'configGraph')
@@ -1222,17 +1222,17 @@ def cppcheck(parser, xml_parent, data):
     XML.SubElement(cgraph, 'ySize').text = str(y)
     gdisplay = graph.get('display', {})
     XML.SubElement(cgraph, 'displayAllErrors').text = \
-        str(gdisplay.get('sum', 'true')).lower()
+        str(gdisplay.get('sum', True)).lower()
     XML.SubElement(cgraph, 'displayErrorSeverity').text = \
-        str(gdisplay.get('error', 'false')).lower()
+        str(gdisplay.get('error', False)).lower()
     XML.SubElement(cgraph, 'displayWarningSeverity').text = \
-        str(gdisplay.get('warning', 'false')).lower()
+        str(gdisplay.get('warning', False)).lower()
     XML.SubElement(cgraph, 'displayStyleSeverity').text = \
-        str(gdisplay.get('style', 'false')).lower()
+        str(gdisplay.get('style', False)).lower()
     XML.SubElement(cgraph, 'displayPerformanceSeverity').text = \
-        str(gdisplay.get('performance', 'false')).lower()
+        str(gdisplay.get('performance', False)).lower()
     XML.SubElement(cgraph, 'displayInformationSeverity').text = \
-        str(gdisplay.get('information', 'false')).lower()
+        str(gdisplay.get('information', False)).lower()
 
 
 def logparser(parser, xml_parent, data):
@@ -1255,9 +1255,9 @@ def logparser(parser, xml_parent, data):
     clog = XML.SubElement(xml_parent,
                           'hudson.plugins.logparser.LogParserPublisher')
     XML.SubElement(clog, 'unstableOnWarning').text = \
-        str(data.get('unstable-on-warning', 'false')).lower()
+        str(data.get('unstable-on-warning', False)).lower()
     XML.SubElement(clog, 'failBuildOnError').text = \
-        str(data.get('fail-on-error', 'false')).lower()
+        str(data.get('fail-on-error', False)).lower()
     # v1.08: this must be the full path, the name of the rules is not enough
     XML.SubElement(clog, 'parsingRulesPath').text = data.get('parse-rules', '')
 
@@ -1643,15 +1643,15 @@ def jabber(parser, xml_parent, data):
                         "all, failure, failure-fixed, or change")
     XML.SubElement(j, 'strategy').text = strategydict[strategy]
     XML.SubElement(j, 'notifyOnBuildStart').text = str(
-        data.get('notify-on-build-start', 'false')).lower()
+        data.get('notify-on-build-start', False)).lower()
     XML.SubElement(j, 'notifySuspects').text = str(
-        data.get('notify-scm-committers', 'false')).lower()
+        data.get('notify-scm-committers', False)).lower()
     XML.SubElement(j, 'notifyCulprits').text = str(
-        data.get('notify-scm-culprits', 'false')).lower()
+        data.get('notify-scm-culprits', False)).lower()
     XML.SubElement(j, 'notifyFixers').text = str(
-        data.get('notify-scm-fixers', 'false')).lower()
+        data.get('notify-scm-fixers', False)).lower()
     XML.SubElement(j, 'notifyUpstreamCommitters').text = str(
-        data.get('notify-upstream-committers', 'false')).lower()
+        data.get('notify-upstream-committers', False)).lower()
     message = data.get('message', 'summary-scm')
     messagedict = {'summary-scm': 'DefaultBuildToChatNotifier',
                    'summary': 'SummaryOnlyBuildToChatNotifier',
@@ -1716,9 +1716,9 @@ def workspace_cleanup(parser, xml_parent, data):
         XML.SubElement(ptrn, 'type').text = "EXCLUDE"
 
     XML.SubElement(p, 'deleteDirs').text = \
-        str(data.get("dirmatch", "false")).lower()
+        str(data.get("dirmatch", False)).lower()
     XML.SubElement(p, 'cleanupMatrixParent').text = \
-        str(data.get("clean-parent", "false")).lower()
+        str(data.get("clean-parent", False)).lower()
 
     mask = {'success': 'cleanWhenSuccess', 'unstable': 'cleanWhenUnstable',
             'failure': 'cleanWhenFailure', 'not-built': 'cleanWhenNotBuilt',
@@ -1733,7 +1733,7 @@ def workspace_cleanup(parser, xml_parent, data):
     if len(cdict) > 0:
         raise ValueError('clean-if must be one of: %r' % list(mask.keys()))
 
-    if str(data.get("fail-build", "false")).lower() == 'false':
+    if str(data.get("fail-build", False)).lower() == 'false':
         XML.SubElement(p, 'notFailBuild').text = 'true'
     else:
         XML.SubElement(p, 'notFailBuild').text = 'false'
@@ -1765,9 +1765,9 @@ def maven_deploy(parser, xml_parent, data):
     XML.SubElement(p, 'id').text = data['id']
     XML.SubElement(p, 'url').text = data['url']
     XML.SubElement(p, 'uniqueVersion').text = str(
-        data.get('unique-version', 'true')).lower()
+        data.get('unique-version', True)).lower()
     XML.SubElement(p, 'evenIfUnstable').text = str(
-        data.get('deploy-unstable', 'false')).lower()
+        data.get('deploy-unstable', False)).lower()
 
 
 def text_finder(parser, xml_parent, data):
@@ -1804,11 +1804,11 @@ def text_finder(parser, xml_parent, data):
     if ('fileset' in data):
         XML.SubElement(finder, 'fileSet').text = data['fileset']
     XML.SubElement(finder, 'regexp').text = data['regexp']
-    check_output = str(data.get('also-check-console-output', 'false')).lower()
+    check_output = str(data.get('also-check-console-output', False)).lower()
     XML.SubElement(finder, 'alsoCheckConsoleOutput').text = check_output
-    succeed_if_found = str(data.get('succeed-if-found', 'false')).lower()
+    succeed_if_found = str(data.get('succeed-if-found', False)).lower()
     XML.SubElement(finder, 'succeedIfFound').text = succeed_if_found
-    unstable_if_found = str(data.get('unstable-if-found', 'false')).lower()
+    unstable_if_found = str(data.get('unstable-if-found', False)).lower()
     XML.SubElement(finder, 'unstableIfFound').text = unstable_if_found
 
 
@@ -1841,7 +1841,7 @@ def html_publisher(parser, xml_parent, data):
     XML.SubElement(ptarget, 'reportName').text = data['name']
     XML.SubElement(ptarget, 'reportDir').text = data['dir']
     XML.SubElement(ptarget, 'reportFiles').text = data['files']
-    keep_all = str(data.get('keep-all', 'false')).lower()
+    keep_all = str(data.get('keep-all', False)).lower()
     XML.SubElement(ptarget, 'keepAll').text = keep_all
     XML.SubElement(ptarget, 'wrapperName').text = "htmlpublisher-wrapper.html"
 
diff --git a/jenkins_jobs/modules/scm.py b/jenkins_jobs/modules/scm.py
index 4e0f107b3..1883b17c9 100644
--- a/jenkins_jobs/modules/scm.py
+++ b/jenkins_jobs/modules/scm.py
@@ -389,7 +389,7 @@ def tfs(self, xml_parent, data):
     XML.SubElement(tfs, 'userName').text = str(
         data.get('login', ''))
     XML.SubElement(tfs, 'useUpdate').text = str(
-        data.get('use-update', 'true'))
+        data.get('use-update', True))
     store = data.get('web-access', None)
     if 'web-access' in data and isinstance(store, list):
         web = XML.SubElement(tfs, 'repositoryBrowser', {'class': 'hudson.'
diff --git a/jenkins_jobs/modules/wrappers.py b/jenkins_jobs/modules/wrappers.py
index de56f478f..dad5fa79e 100644
--- a/jenkins_jobs/modules/wrappers.py
+++ b/jenkins_jobs/modules/wrappers.py
@@ -161,7 +161,7 @@ def workspace_cleanup(parser, xml_parent, data):
         XML.SubElement(ptrn, 'type').text = "EXCLUDE"
 
     deldirs = XML.SubElement(p, 'deleteDirs')
-    deldirs.text = str(data.get("dirmatch", "false")).lower()
+    deldirs.text = str(data.get("dirmatch", False)).lower()
 
 
 def rvm_env(parser, xml_parent, data):
@@ -306,9 +306,9 @@ def copy_to_slave(parser, xml_parent, data):
     XML.SubElement(cs, 'includes').text = ','.join(data.get('includes', ['']))
     XML.SubElement(cs, 'excludes').text = ','.join(data.get('excludes', ['']))
     XML.SubElement(cs, 'flatten').text = \
-        str(data.get('flatten', 'false')).lower()
+        str(data.get('flatten', False)).lower()
     XML.SubElement(cs, 'includeAntExcludes').text = \
-        str(data.get('include-ant-excludes', 'false')).lower()
+        str(data.get('include-ant-excludes', False)).lower()
 
     rel = str(data.get('relative-to', 'userContent'))
     opt = ('userContent', 'home', 'workspace')
@@ -478,11 +478,11 @@ def release(parser, xml_parent, data):
     # For 'keep-forever', the sense of the XML flag is the opposite of
     # the YAML flag.
     no_keep_forever = 'false'
-    if str(data.get('keep-forever', 'true')).lower() == 'false':
+    if str(data.get('keep-forever', True)).lower() == 'false':
         no_keep_forever = 'true'
     XML.SubElement(relwrap, 'doNotKeepLog').text = no_keep_forever
     XML.SubElement(relwrap, 'overrideBuildParameters').text = str(
-        data.get('override-build-parameters', 'false')).lower()
+        data.get('override-build-parameters', False)).lower()
     XML.SubElement(relwrap, 'releaseVersionTemplate').text = data.get(
         'version-template', '')
     for param in data.get('parameters', []):