diff --git a/org.eclipse.help.base/META-INF/MANIFEST.MF b/org.eclipse.help.base/META-INF/MANIFEST.MF
index 7b98741..a2dc063 100644
--- a/org.eclipse.help.base/META-INF/MANIFEST.MF
+++ b/org.eclipse.help.base/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@
 Bundle-ManifestVersion: 2
 Bundle-Name: %help_base_plugin_name
 Bundle-SymbolicName: org.eclipse.help.base; singleton:=true
-Bundle-Version: 4.3.300.qualifier
+Bundle-Version: 4.3.400.qualifier
 Bundle-Activator: org.eclipse.help.internal.base.HelpBasePlugin
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
diff --git a/org.eclipse.help.base/pom.xml b/org.eclipse.help.base/pom.xml
index ade3f03..7e1b43e 100644
--- a/org.eclipse.help.base/pom.xml
+++ b/org.eclipse.help.base/pom.xml
@@ -18,7 +18,7 @@
   </parent>
   <groupId>org.eclipse.help</groupId>
   <artifactId>org.eclipse.help.base</artifactId>
-  <version>4.3.300-SNAPSHOT</version>
+  <version>4.3.400-SNAPSHOT</version>
   <packaging>eclipse-plugin</packaging>
   <properties>
     <defaultSigning-excludeInnerJars>true</defaultSigning-excludeInnerJars>
diff --git a/org.eclipse.help.webapp/META-INF/MANIFEST.MF b/org.eclipse.help.webapp/META-INF/MANIFEST.MF
index 86356bf..618cc19 100644
--- a/org.eclipse.help.webapp/META-INF/MANIFEST.MF
+++ b/org.eclipse.help.webapp/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@
 Bundle-ManifestVersion: 2
 Bundle-Name: %help_webapp_plugin_name
 Bundle-SymbolicName: org.eclipse.help.webapp;singleton:=true
-Bundle-Version: 3.10.300.qualifier
+Bundle-Version: 3.10.400.qualifier
 Bundle-Activator: org.eclipse.help.internal.webapp.HelpWebappPlugin
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin
diff --git a/org.eclipse.help.webapp/forceQualifierUpdate.txt b/org.eclipse.help.webapp/forceQualifierUpdate.txt
index aecedcc..f1db9cc 100644
--- a/org.eclipse.help.webapp/forceQualifierUpdate.txt
+++ b/org.eclipse.help.webapp/forceQualifierUpdate.txt
@@ -3,3 +3,4 @@
 Bug 430284 - Update Orbit pre-reqs to latest Orbit I-build
 Bug 510404 - Comparator errors in I20170112-2000
 Bug 558450 - Unanticipated comparator errors in I20191218-1805
+Bug 573965 - Version bumps for 4.21 stream
\ No newline at end of file
diff --git a/org.eclipse.help.webapp/pom.xml b/org.eclipse.help.webapp/pom.xml
index 01f8fff..d92a1c2 100644
--- a/org.eclipse.help.webapp/pom.xml
+++ b/org.eclipse.help.webapp/pom.xml
@@ -18,7 +18,7 @@
   </parent>
   <groupId>org.eclipse.help</groupId>
   <artifactId>org.eclipse.help.webapp</artifactId>
-  <version>3.10.300-SNAPSHOT</version>
+  <version>3.10.400-SNAPSHOT</version>
   <packaging>eclipse-plugin</packaging>
   <build>
     <plugins>