diff --git a/docs-core/src/main/java/com/sismics/docs/core/util/indexing/LuceneIndexingHandler.java b/docs-core/src/main/java/com/sismics/docs/core/util/indexing/LuceneIndexingHandler.java
index 5a190c58..a1ca6bae 100644
--- a/docs-core/src/main/java/com/sismics/docs/core/util/indexing/LuceneIndexingHandler.java
+++ b/docs-core/src/main/java/com/sismics/docs/core/util/indexing/LuceneIndexingHandler.java
@@ -46,7 +46,6 @@ import org.slf4j.LoggerFactory;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
-import java.nio.file.Paths;
 import java.sql.Timestamp;
 import java.util.*;
 
@@ -390,7 +389,7 @@ public class LuceneIndexingHandler implements IndexingHandler {
         LuceneDictionary dictionary = new LuceneDictionary(directoryReader, "title");
         suggester.build(dictionary);
         int lastIndex = search.lastIndexOf(' ');
-        String suggestQuery = search.substring(lastIndex < 0 ? 0 : lastIndex);
+        String suggestQuery = search.substring(Math.max(lastIndex, 0));
         List<Lookup.LookupResult> lookupResultList = suggester.lookup(suggestQuery, false, 10);
         for (Lookup.LookupResult lookupResult : lookupResultList) {
             suggestionList.add(lookupResult.key.toString());
diff --git a/docs-web-common/pom.xml b/docs-web-common/pom.xml
index 20d53ded..be6c07b2 100644
--- a/docs-web-common/pom.xml
+++ b/docs-web-common/pom.xml
@@ -68,6 +68,11 @@
       <groupId>joda-time</groupId>
       <artifactId>joda-time</artifactId>
     </dependency>
+
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>jul-to-slf4j</artifactId>
+    </dependency>
     
     <!-- Test dependencies -->
     <dependency>
diff --git a/docs-web-common/src/main/java/com/sismics/util/filter/RequestContextFilter.java b/docs-web-common/src/main/java/com/sismics/util/filter/RequestContextFilter.java
index 224998c4..8fecd0fb 100644
--- a/docs-web-common/src/main/java/com/sismics/util/filter/RequestContextFilter.java
+++ b/docs-web-common/src/main/java/com/sismics/util/filter/RequestContextFilter.java
@@ -11,6 +11,7 @@ import org.apache.log4j.PatternLayout;
 import org.apache.log4j.RollingFileAppender;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.slf4j.bridge.SLF4JBridgeHandler;
 
 import javax.persistence.EntityManager;
 import javax.persistence.EntityTransaction;
@@ -57,6 +58,8 @@ public class RequestContextFilter implements Filter {
         fileAppender.setMaxBackupIndex(5);
         fileAppender.activateOptions();
         org.apache.log4j.Logger.getRootLogger().addAppender(fileAppender);
+        SLF4JBridgeHandler.removeHandlersForRootLogger();
+        SLF4JBridgeHandler.install();
         
         // Initialize the application context
         TransactionUtil.handle(AppContext::getInstance);
diff --git a/docs-web/src/dev/resources/log4j.properties b/docs-web/src/dev/resources/log4j.properties
index 0b05e8e9..91f327c9 100644
--- a/docs-web/src/dev/resources/log4j.properties
+++ b/docs-web/src/dev/resources/log4j.properties
@@ -6,3 +6,5 @@ log4j.appender.MEMORY=com.sismics.util.log4j.MemoryAppender
 log4j.appender.MEMORY.size=1000
 
 log4j.logger.com.sismics=DEBUG
+log4j.logger.org.apache.pdfbox=ERROR
+log4j.logger.org.glassfish.jersey.servlet.WebComponent=ERROR
\ No newline at end of file
diff --git a/docs-web/src/prod/resources/log4j.properties b/docs-web/src/prod/resources/log4j.properties
index 130264d3..75203ec9 100644
--- a/docs-web/src/prod/resources/log4j.properties
+++ b/docs-web/src/prod/resources/log4j.properties
@@ -6,4 +6,5 @@ log4j.appender.MEMORY=com.sismics.util.log4j.MemoryAppender
 log4j.appender.MEMORY.size=1000
 
 log4j.logger.com.sismics=INFO
-log4j.logger.org.apache.pdfbox=ERROR
\ No newline at end of file
+log4j.logger.org.apache.pdfbox=ERROR
+log4j.logger.org.glassfish.jersey.servlet.WebComponent=ERROR
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index b3b8adb0..51c8b900 100644
--- a/pom.xml
+++ b/pom.xml
@@ -26,6 +26,7 @@
     <log4j.log4j.version>1.2.16</log4j.log4j.version>
     <org.slf4j.version>1.6.4</org.slf4j.version>
     <org.slf4j.jcl-over-slf4j.version>1.6.6</org.slf4j.jcl-over-slf4j.version>
+    <org.slf4j.jul-to-slf4j.version>1.6.6</org.slf4j.jul-to-slf4j.version>
     <junit.junit.version>4.12</junit.junit.version>
     <com.h2database.h2.version>1.4.197</com.h2database.h2.version>
     <org.glassfish.jersey.version>2.27</org.glassfish.jersey.version>
@@ -240,7 +241,13 @@
         <artifactId>jcl-over-slf4j</artifactId>
         <version>${org.slf4j.jcl-over-slf4j.version}</version>
       </dependency>
-      
+
+      <dependency>
+        <groupId>org.slf4j</groupId>
+        <artifactId>jul-to-slf4j</artifactId>
+        <version>${org.slf4j.jul-to-slf4j.version}</version>
+      </dependency>
+
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>