diff --git a/integration/src/IBUNDLE-META-INF/MANIFEST.MF b/integration/src/IBUNDLE-META-INF/MANIFEST.MF
index 10d0444..d518a2b 100644
--- a/integration/src/IBUNDLE-META-INF/MANIFEST.MF
+++ b/integration/src/IBUNDLE-META-INF/MANIFEST.MF
@@ -10,6 +10,6 @@
 Bundle-ManifestVersion: 2
 Bundle-SymbolicName: iBundle
 Bundle-Name: abundle
-Bundle-RequiredExecutionEnvironment: J2SE-1.3
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Export-Package: apack
 Import-Package: org.osgi.framework, org.slf4j;version=1.5
\ No newline at end of file
diff --git a/jcl-over-slf4j/src/main/resources/META-INF/MANIFEST.MF b/jcl-over-slf4j/src/main/resources/META-INF/MANIFEST.MF
index a78719a..d5233ea 100644
--- a/jcl-over-slf4j/src/main/resources/META-INF/MANIFEST.MF
+++ b/jcl-over-slf4j/src/main/resources/META-INF/MANIFEST.MF
@@ -3,7 +3,7 @@
 Bundle-SymbolicName: jcl.over.slf4j
 Bundle-Name: jcl-over-slf4j
 Bundle-Vendor: SLF4J.ORG
-Bundle-RequiredExecutionEnvironment: J2SE-1.3
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Export-Package: org.apache.commons.logging;version=1.1.1, 
   org.apache.commons.logging.impl;version=1.1.1
 Import-Package: org.slf4j;version=${parsedVersion.osgiVersion}, org.slf4j.spi;version=${parsedVersion.osgiVersion}
diff --git a/jul-to-slf4j/pom.xml b/jul-to-slf4j/pom.xml
index 3f09844..47e7dbc 100755
--- a/jul-to-slf4j/pom.xml
+++ b/jul-to-slf4j/pom.xml
@@ -38,8 +38,8 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
         <configuration>
-          <source>1.5</source>
-          <target>1.5</target>
+          <source>${required.jdk.version}</source>
+          <target>${required.jdk.version}</target>
         </configuration>
       </plugin>
       <plugin>
diff --git a/jul-to-slf4j/src/main/resources/META-INF/MANIFEST.MF b/jul-to-slf4j/src/main/resources/META-INF/MANIFEST.MF
index 1e2208d..e1ab4c0 100644
--- a/jul-to-slf4j/src/main/resources/META-INF/MANIFEST.MF
+++ b/jul-to-slf4j/src/main/resources/META-INF/MANIFEST.MF
@@ -2,6 +2,6 @@
 Bundle-SymbolicName: jul.to.slf4j
 Bundle-Name: jul-to-slf4j
 Bundle-Vendor: SLF4J.ORG
-Bundle-RequiredExecutionEnvironment: J2SE-1.3
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Export-Package: org.slf4j.bridge;version=${parsedVersion.osgiVersion};uses:="org.slf4j,org.slf4j.spi"
 Import-Package: org.slf4j;version=${parsedVersion.osgiVersion},org.slf4j.spi;version=${parsedVersion.osgiVersion}
diff --git a/log4j-over-slf4j/src/main/resources/META-INF/MANIFEST.MF b/log4j-over-slf4j/src/main/resources/META-INF/MANIFEST.MF
index 6703b64..531f584 100644
--- a/log4j-over-slf4j/src/main/resources/META-INF/MANIFEST.MF
+++ b/log4j-over-slf4j/src/main/resources/META-INF/MANIFEST.MF
@@ -3,6 +3,6 @@
 Bundle-SymbolicName: log4j.over.slf4j
 Bundle-Name: log4j-over-slf4j
 Bundle-Vendor: SLF4J.ORG
-Bundle-RequiredExecutionEnvironment: J2SE-1.3
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Export-Package: org.apache.log4j;version=${log4j.version},org.apache.log4j.helpers;version=${log4j.version},org.apache.log4j.spi;version=${log4j.version},org.apache.log4j.xml;version=${log4j.version}
 Import-Package: org.slf4j;version=${slf4j.api.minimum.compatible.version}, org.slf4j.helpers;version=${slf4j.api.minimum.compatible.version}, org.slf4j.spi;version=${slf4j.api.minimum.compatible.version}
diff --git a/pom.xml b/pom.xml
index 022a411..86e6766 100755
--- a/pom.xml
+++ b/pom.xml
@@ -35,6 +35,7 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <required.jdk.version>1.5</required.jdk.version>
     <slf4j.api.minimum.compatible.version>1.6.0</slf4j.api.minimum.compatible.version>
     <cal10n.version>0.8.1</cal10n.version>
     <log4j.version>1.2.17</log4j.version>
diff --git a/slf4j-android/pom.xml b/slf4j-android/pom.xml
index bce3be5..c6fbd90 100644
--- a/slf4j-android/pom.xml
+++ b/slf4j-android/pom.xml
@@ -53,8 +53,8 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <configuration>
-                    <source>1.5</source>
-                    <target>1.5</target>
+                    <source>${required.jdk.version}</source>
+                    <target>${required.jdk.version}</target>
                 </configuration>
             </plugin>
         </plugins>
diff --git a/slf4j-api/src/main/resources/META-INF/MANIFEST.MF b/slf4j-api/src/main/resources/META-INF/MANIFEST.MF
index 9dfbf9f..2940ef8 100644
--- a/slf4j-api/src/main/resources/META-INF/MANIFEST.MF
+++ b/slf4j-api/src/main/resources/META-INF/MANIFEST.MF
@@ -3,6 +3,6 @@
 Bundle-SymbolicName: slf4j.api
 Bundle-Name: slf4j-api
 Bundle-Vendor: SLF4J.ORG
-Bundle-RequiredExecutionEnvironment: J2SE-1.3
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Export-Package: org.slf4j;version=${parsedVersion.osgiVersion}, org.slf4j.spi;version=${parsedVersion.osgiVersion}, org.slf4j.helpers;version=${parsedVersion.osgiVersion}
 Import-Package: org.slf4j.impl;version=${slf4j.api.minimum.compatible.version}
diff --git a/slf4j-ext/pom.xml b/slf4j-ext/pom.xml
index e9e21df..223eac7 100755
--- a/slf4j-ext/pom.xml
+++ b/slf4j-ext/pom.xml
@@ -53,8 +53,8 @@
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
 				<configuration>
-					<source>1.5</source>
-					<target>1.5</target>
+					<source>${required.jdk.version}</source>
+					<target>${required.jdk.version}</target>
 				</configuration>
 			</plugin>
 
diff --git a/slf4j-jcl/src/main/resources/META-INF/MANIFEST.MF b/slf4j-jcl/src/main/resources/META-INF/MANIFEST.MF
index ea973a0..a9ee90e 100644
--- a/slf4j-jcl/src/main/resources/META-INF/MANIFEST.MF
+++ b/slf4j-jcl/src/main/resources/META-INF/MANIFEST.MF
@@ -4,7 +4,7 @@
 Bundle-Name: slf4j-jcl
 Bundle-Vendor: SLF4J.ORG
 Require-Bundle: slf4j.api
-Bundle-RequiredExecutionEnvironment: J2SE-1.3
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Export-Package: org.slf4j.impl;version=${parsedVersion.osgiVersion}
 Import-Package: org.slf4j.spi;version=${parsedVersion.osgiVersion}, org.slf4j.helpers;version=${parsedVersion.osgiVersion}, org.apache.commons.logging
 Fragment-Host: slf4j.api
\ No newline at end of file
diff --git a/slf4j-jdk14/src/main/resources/META-INF/MANIFEST.MF b/slf4j-jdk14/src/main/resources/META-INF/MANIFEST.MF
index 1593db3..bab3c6f 100644
--- a/slf4j-jdk14/src/main/resources/META-INF/MANIFEST.MF
+++ b/slf4j-jdk14/src/main/resources/META-INF/MANIFEST.MF
@@ -3,7 +3,7 @@
 Bundle-SymbolicName: slf4j.jdk14
 Bundle-Name: slf4j-jdk14
 Bundle-Vendor: SLF4J.ORG
-Bundle-RequiredExecutionEnvironment: J2SE-1.3
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Export-Package: org.slf4j.impl;version=${parsedVersion.osgiVersion}
 Import-Package: org.slf4j;version=${parsedVersion.osgiVersion}, org.slf4j.spi;version=${parsedVersion.osgiVersion}, org.slf4j.helpers;version=${parsedVersion.osgiVersion}
 Fragment-Host: slf4j.api
\ No newline at end of file
diff --git a/slf4j-log4j12/src/main/resources/META-INF/MANIFEST.MF b/slf4j-log4j12/src/main/resources/META-INF/MANIFEST.MF
index a76da1c..23a4295 100644
--- a/slf4j-log4j12/src/main/resources/META-INF/MANIFEST.MF
+++ b/slf4j-log4j12/src/main/resources/META-INF/MANIFEST.MF
@@ -3,7 +3,7 @@
 Bundle-SymbolicName: slf4j.log4j12
 Bundle-Name: slf4j-log4j12
 Bundle-Vendor: SLF4J.ORG
-Bundle-RequiredExecutionEnvironment: J2SE-1.3
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Export-Package: org.slf4j.impl;version=${parsedVersion.osgiVersion}
 Import-Package: org.slf4j;version=${parsedVersion.osgiVersion}, org.slf4j.spi;version=${parsedVersion.osgiVersion}, org.slf4j.helpers;version=${parsedVersion.osgiVersion}, org.apache.log4j
 Fragment-Host: slf4j.api
\ No newline at end of file
diff --git a/slf4j-migrator/pom.xml b/slf4j-migrator/pom.xml
index f3798ef..104673b 100755
--- a/slf4j-migrator/pom.xml
+++ b/slf4j-migrator/pom.xml
@@ -24,8 +24,8 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-compiler-plugin</artifactId>
         <configuration>
-          <source>1.5</source>
-          <target>1.5</target>
+          <source>${required.jdk.version}</source>
+          <target>${required.jdk.version}</target>
         </configuration>
       </plugin>
 
diff --git a/slf4j-nop/src/main/resources/META-INF/MANIFEST.MF b/slf4j-nop/src/main/resources/META-INF/MANIFEST.MF
index 25891ad..c009d03 100644
--- a/slf4j-nop/src/main/resources/META-INF/MANIFEST.MF
+++ b/slf4j-nop/src/main/resources/META-INF/MANIFEST.MF
@@ -3,7 +3,7 @@
 Bundle-SymbolicName: slf4j.nop
 Bundle-Name: slf4j-nop
 Bundle-Vendor: SLF4J.ORG
-Bundle-RequiredExecutionEnvironment: J2SE-1.3
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Export-Package: org.slf4j.impl;version=${parsedVersion.osgiVersion}
 Import-Package: org.slf4j;version=${parsedVersion.osgiVersion}, org.slf4j.spi;version=${parsedVersion.osgiVersion}, org.slf4j.helpers;version=${parsedVersion.osgiVersion}
 Fragment-Host: slf4j.api
\ No newline at end of file
diff --git a/slf4j-simple/src/main/resources/META-INF/MANIFEST.MF b/slf4j-simple/src/main/resources/META-INF/MANIFEST.MF
index 54c78bd..897c972 100644
--- a/slf4j-simple/src/main/resources/META-INF/MANIFEST.MF
+++ b/slf4j-simple/src/main/resources/META-INF/MANIFEST.MF
@@ -4,7 +4,7 @@
 Bundle-Name: slf4j-simple
 Bundle-Vendor: SLF4J.ORG
 Require-Bundle: slf4j.api
-Bundle-RequiredExecutionEnvironment: J2SE-1.3
+Bundle-RequiredExecutionEnvironment: J2SE-1.5
 Export-Package: org.slf4j.impl;version=${parsedVersion.osgiVersion}
 Import-Package: org.slf4j;version=${parsedVersion.osgiVersion}, org.slf4j.spi;version=${parsedVersion.osgiVersion}, org.slf4j.helpers;version=${parsedVersion.osgiVersion}
 Fragment-Host: slf4j.api
\ No newline at end of file
diff --git a/slf4j-site/src/site/pages/news.html b/slf4j-site/src/site/pages/news.html
index 5cfb1e2..ef0aac7 100755
--- a/slf4j-site/src/site/pages/news.html
+++ b/slf4j-site/src/site/pages/news.html
@@ -29,8 +29,17 @@
 
    <hr noshade="noshade" size="1"/>
 
-   <h3>, 2015 - Release of SLF4J 1.7.11</h3>
+   <h3>March 26th, 2015 - Release of SLF4J 1.7.11</h3>
 
+   <p>As SLF4J requires JDK 1.5 or later, the
+   <code>Bundle-RequiredExecutionEnvironment</code> declaration in the
+   various MANIFEST files have been updated to J2SE-1.5.
+   </p>
+
+   <p>Added missing Bundle-ManifestVersion attribute in the MANIFEST
+   files in log4j-over-slf4j. The issue was raised in <a
+   href="http://jira.qos.ch/browse/SLF4J-321">SLF4J-231</a> by Nikolas
+   Falco who also provided the the appropriate pull request. </p>
 
    <p>Added <code>setThreshold</code> method in
    <code>AppenderSkeleton</code> class in the log4j-over-slf4j