diff --git a/VERSIONS_HOTLINE/160807 b/VERSIONS_HOTLINE/160807
new file mode 100644
index 0000000000000000000000000000000000000000..8950df74ebe8c1714011a0737d725ae290492431
--- /dev/null
+++ b/VERSIONS_HOTLINE/160807
@@ -0,0 +1 @@
+ - correctif #160807 : Cosmogramme : taille maximum des indices Dewey élargie à 255 caractères
\ No newline at end of file
diff --git a/cosmogramme/sql/patch/patch_436.php b/cosmogramme/sql/patch/patch_436.php
new file mode 100644
index 0000000000000000000000000000000000000000..7efde9f875b946afbd01003ad4025756abf248b8
--- /dev/null
+++ b/cosmogramme/sql/patch/patch_436.php
@@ -0,0 +1,10 @@
+<?php
+$adapter = Zend_Db_Table_Abstract::getDefaultAdapter();
+try {
+  $adapter->query('alter table codif_dewey drop primary key');
+} catch(Exception $e) {}
+
+try {
+  $adapter->query('alter table codif_dewey modify id_dewey varchar(255)');
+  $adapter->query('alter table codif_dewey add primary key (id_dewey)');
+} catch(Exception $e) {}
diff --git a/tests/db/UpgradeDBTest.php b/tests/db/UpgradeDBTest.php
index 82e123f310c5532905e360524564891edea11b59..5686a10b78deb32d318d343eeab29a405cd94ead 100644
--- a/tests/db/UpgradeDBTest.php
+++ b/tests/db/UpgradeDBTest.php
@@ -4699,3 +4699,25 @@ class UpgradeDB_435_Test extends UpgradeDBTestCase {
     $this->assertFieldType('records_identifiers', $field, $type);
   }
 }
+
+
+
+
+class UpgradeDB_436_Test extends UpgradeDBTestCase {
+  public function prepare() {
+    $this->silentQuery('alter table codif_dewey modify id_dewey varchar(30)');
+  }
+
+
+  /** @test */
+  public function tableCodifDeweyShouldHaveColumnIdDeweyWithTypeVarchar255() {
+    $this->assertFieldType('codif_dewey', 'id_dewey', 'varchar(255)');
+  }
+
+
+  /** @test */
+  public function tableCodifDeweyShouldHaveIdDeweyAsPrimary() {
+    $columns = $this->query("show columns from codif_dewey where field='id_dewey'")->fetch();
+    $this->assertEquals('PRI', $columns['Key']);
+  }
+}