diff --git a/pom.xml b/pom.xml
index f8e8276b8ff..3f412da00dd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -77,15 +77,15 @@
     <jetty.version>6.1.25</jetty.version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <maven.min.version>2.2.1</maven.min.version>
-    <jdk.min.version>1.5</jdk.min.version>
+    <jdk.min.version>1.6</jdk.min.version>
     <timestamp>${maven.build.timestamp}</timestamp>
     <maven.build.timestamp.format>yyyy-MM-dd'T'HH:mm:ssZ</maven.build.timestamp.format>
 
     <!-- To configure animal-sniffer to check API compat -->
     <animal-sniffer.signature.groupId>org.codehaus.mojo.signature</animal-sniffer.signature.groupId>
-    <animal-sniffer.signature.artifactId>java15</animal-sniffer.signature.artifactId>
-    <animal-sniffer.signature.version>1.0</animal-sniffer.signature.version>
-    <version.animal-sniffer.plugin>1.7</version.animal-sniffer.plugin>
+    <animal-sniffer.signature.artifactId>java16</animal-sniffer.signature.artifactId>
+    <animal-sniffer.signature.version>1.1</animal-sniffer.signature.version>
+    <version.animal-sniffer.plugin>1.9</version.animal-sniffer.plugin>
     <version.maven-license.plugin>1.9.0</version.maven-license.plugin>
     <skipSanityChecks>false</skipSanityChecks>
 
@@ -654,9 +654,9 @@
         <version>2.2.3</version>
       </dependency>
       <dependency>
-        <groupId>org.codehaus.sonar</groupId>
-        <artifactId>sonar-blueprints-core</artifactId>
-        <version>2.2.0-java5</version>
+        <groupId>com.tinkerpop.blueprints</groupId>
+        <artifactId>blueprints-core</artifactId>
+        <version>2.2.0</version>
       </dependency>
       <dependency>
         <groupId>commons-collections</groupId>
@@ -696,8 +696,7 @@
       <dependency>
         <groupId>commons-dbcp</groupId>
         <artifactId>commons-dbcp</artifactId>
-        <!-- do not upgrade to version 1.4, not compatible with Java5 -->
-        <version>1.3</version>
+        <version>1.4</version>
       </dependency>
       <dependency>
         <!-- See SONAR-2512 -->
@@ -838,8 +837,7 @@
       <dependency>
         <groupId>postgresql</groupId>
         <artifactId>postgresql</artifactId>
-        <!-- do not upgrade to version 9.1-901.jdbc4, not compatible with Java 5 -->
-        <version>9.1-901.jdbc3</version>
+        <version>9.1-901-1.jdbc4</version>
       </dependency>
       <dependency>
         <groupId>net.sourceforge.jtds</groupId>
diff --git a/sonar-core/pom.xml b/sonar-core/pom.xml
index df05ec263d6..ca0e3488548 100644
--- a/sonar-core/pom.xml
+++ b/sonar-core/pom.xml
@@ -69,9 +69,8 @@
       <artifactId>json-simple</artifactId>
     </dependency>
     <dependency>
-      <!-- version compiled for java 5 -->
-      <groupId>org.codehaus.sonar</groupId>
-      <artifactId>sonar-blueprints-core</artifactId>
+      <groupId>com.tinkerpop.blueprints</groupId>
+      <artifactId>blueprints-core</artifactId>
       <exclusions>
         <exclusion>
           <groupId>org.codehaus.jackson</groupId>
diff --git a/sonar-server/src/main/java/org/sonar/server/platform/MasterServletFilter.java b/sonar-server/src/main/java/org/sonar/server/platform/MasterServletFilter.java
index 56bb22aac1d..0126e8d6886 100644
--- a/sonar-server/src/main/java/org/sonar/server/platform/MasterServletFilter.java
+++ b/sonar-server/src/main/java/org/sonar/server/platform/MasterServletFilter.java
@@ -53,6 +53,7 @@ public class MasterServletFilter implements Filter {
     INSTANCE = this;
   }
 
+  @Override
   public void init(FilterConfig config) throws ServletException {
     // Filters are already available in picocontainer unless a database migration is required. See org.sonar.server.startup.RegisterServletFilters.
     init(config, Platform.getInstance().getContainer().getComponentsByType(ServletFilter.class));
@@ -77,6 +78,7 @@ public class MasterServletFilter implements Filter {
     filters = filterList.toArray(new ServletFilter[filterList.size()]);
   }
 
+  @Override
   public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws ServletException, IOException {
     HttpServletRequest hsr = (HttpServletRequest) request;
     if (filters.length == 0) {
@@ -94,6 +96,7 @@ public class MasterServletFilter implements Filter {
     }
   }
 
+  @Override
   public void destroy() {
     for (ServletFilter filter : filters) {
       filter.destroy();
diff --git a/sonar-server/src/main/java/org/sonar/server/qualitymodel/DefaultModelManager.java b/sonar-server/src/main/java/org/sonar/server/qualitymodel/DefaultModelManager.java
index 30c0c63e57a..300b53153d0 100644
--- a/sonar-server/src/main/java/org/sonar/server/qualitymodel/DefaultModelManager.java
+++ b/sonar-server/src/main/java/org/sonar/server/qualitymodel/DefaultModelManager.java
@@ -52,6 +52,7 @@ public final class DefaultModelManager implements ServerComponent, ModelManager
   /**
    * Executed when the server starts
    */
+  @Override
   public ModelManager registerDefinitions() {
     DatabaseSession session = sessionFactory.getSession();
     for (ModelDefinition definition : definitions) {
@@ -68,6 +69,7 @@ public final class DefaultModelManager implements ServerComponent, ModelManager
     return this;
   }
 
+  @Override
   public Model reset(String name) {
     ModelDefinition definition = findDefinitionByName(name);
     if (definition == null) {
@@ -93,7 +95,7 @@ public final class DefaultModelManager implements ServerComponent, ModelManager
       throw e;
     }
   }
-
+  @Override
   public ModelDefinition findDefinitionByName(String name) {
     for (ModelDefinition definition : definitions) {
       if (StringUtils.equals(name, definition.getName())) {
diff --git a/sonar-server/src/main/java/org/sonar/server/ui/DatabaseSessionFilter.java b/sonar-server/src/main/java/org/sonar/server/ui/DatabaseSessionFilter.java
index 99fc8e7cd7c..5da45b01d90 100644
--- a/sonar-server/src/main/java/org/sonar/server/ui/DatabaseSessionFilter.java
+++ b/sonar-server/src/main/java/org/sonar/server/ui/DatabaseSessionFilter.java
@@ -26,10 +26,12 @@ import java.io.IOException;
 import javax.servlet.*;
 
 public class DatabaseSessionFilter implements Filter {
+  @Override
   public void init(FilterConfig filterConfig) throws ServletException {
 
   }
 
+  @Override
   public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
     chain.doFilter(request, response);
 
@@ -39,6 +41,7 @@ public class DatabaseSessionFilter implements Filter {
     }
   }
 
+  @Override
   public void destroy() {
 
   }