diff --git a/legi2odf/legi2odf.xsl b/legi2odf/legi2odf.xsl
index 3b6789a..f4c71d4 100644
--- a/legi2odf/legi2odf.xsl
+++ b/legi2odf/legi2odf.xsl
@@ -28,7 +28,7 @@
     </xsl:element>
   </xsl:template>
 
-  <xsl:template match="part|chapter|sect1|sect2|sect3|preface|synthese|legistic_book|legistic_part|legistic_title|legistic_chapter|legistic_section|legistic_subsection|nosection">
+  <xsl:template match="part|chapter|sect1|sect2|sect3|sect4|preface|synthese|legistic_book|legistic_part|legistic_title|legistic_chapter|legistic_section|legistic_subsection|nosection">
     <xsl:apply-templates select="*"/>
   </xsl:template>
 
@@ -143,6 +143,7 @@
             <xsl:when test="$par = 'sect1'">Heading_20_3</xsl:when>
             <xsl:when test="$par = 'sect2'">Heading_20_4</xsl:when>
             <xsl:when test="$par = 'sect3'">Heading_20_5</xsl:when>
+            <xsl:when test="$par = 'sect4'">Heading_20_6</xsl:when>
             <xsl:otherwise>
               <xsl:message>Unknown location for title: <xsl:value-of select="$par"/></xsl:message>
             </xsl:otherwise>
@@ -154,6 +155,7 @@
             <xsl:when test="$par = 'sect1'">3</xsl:when>
             <xsl:when test="$par = 'sect2'">4</xsl:when>
             <xsl:when test="$par = 'sect3'">5</xsl:when>
+            <xsl:when test="$par = 'sect4'">6</xsl:when>
           </xsl:choose>
         </xsl:attribute><xsl:value-of select="."/></text:h>
       </xsl:otherwise>
diff --git a/odf2legi/odf2legi.py b/odf2legi/odf2legi.py
index 21b5ac1..128e6f7 100644
--- a/odf2legi/odf2legi.py
+++ b/odf2legi/odf2legi.py
@@ -60,6 +60,9 @@ TITLE_LEVELS = {
     'Sec 1.1.1': 'sect3',
     'Sec_20_1.1.1': 'sect3',
     'Heading_20_5': 'sect3',
+    'Sec 1.1.1.1': 'sect4',
+    'Sec_20_1.1.1.1': 'sect4',
+    'Heading_20_6': 'sect4',
     'Lchapitre': 'legistic_chapter',
     'Lsection': 'legistic_section',
     'LSous-Section': 'legistic_subsection',
@@ -899,7 +902,8 @@ def convert_to_legi_xml(content, metadata = None):
     speech = None
     offstructure = None
 
-    levels = {'book':0, 'part':1, 'chapter':2, 'preface':2, 'synthese':2, 'sect1':3, 'sect2':4, 'sect3':5}
+    levels = {'book':0, 'part':1, 'chapter':2, 'preface':2, 'synthese':2,
+            'sect1':3, 'sect2':4, 'sect3':5, 'sect4':6}
     legistic_levels = {'legistic_part': 0,
                        'legistic_book': 1,
                        'legistic_title': 2,