diff --git a/src/main/java/org/gridsuite/useradmin/server/entity/AnnouncementEntity.java b/src/main/java/org/gridsuite/useradmin/server/entity/AnnouncementEntity.java
index 62c1d26..388f635 100644
--- a/src/main/java/org/gridsuite/useradmin/server/entity/AnnouncementEntity.java
+++ b/src/main/java/org/gridsuite/useradmin/server/entity/AnnouncementEntity.java
@@ -22,7 +22,7 @@
 @Getter
 @Setter
 @Entity
-@Table(name = "announcement")
+@Table(name = "announcement", indexes = @Index(name = "start_end_date_index", columnList = "startDate, endDate"))
 public class AnnouncementEntity {
 
     @Id
diff --git a/src/main/resources/db/changelog/changesets/changelog_20251031T110224Z.xml b/src/main/resources/db/changelog/changesets/changelog_20251031T110224Z.xml
new file mode 100644
index 0000000..ae19e06
--- /dev/null
+++ b/src/main/resources/db/changelog/changesets/changelog_20251031T110224Z.xml
@@ -0,0 +1,9 @@
+<?xml version="1.1" encoding="UTF-8" standalone="no"?>
+<databaseChangeLog xmlns="http://www.liquibase.org/xml/ns/dbchangelog" xmlns:ext="http://www.liquibase.org/xml/ns/dbchangelog-ext" xmlns:pro="http://www.liquibase.org/xml/ns/pro" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.liquibase.org/xml/ns/dbchangelog-ext http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-ext.xsd http://www.liquibase.org/xml/ns/pro http://www.liquibase.org/xml/ns/pro/liquibase-pro-latest.xsd http://www.liquibase.org/xml/ns/dbchangelog http://www.liquibase.org/xml/ns/dbchangelog/dbchangelog-latest.xsd">
+    <changeSet author="lecuyerfra (generated)" id="1762182222231-7">
+        <createIndex indexName="start_end_date_index" tableName="announcement">
+            <column name="start_date"/>
+            <column name="end_date"/>
+        </createIndex>
+    </changeSet>
+</databaseChangeLog>
diff --git a/src/main/resources/db/changelog/db.changelog-master.yaml b/src/main/resources/db/changelog/db.changelog-master.yaml
index a4449ba..c22dfdf 100644
--- a/src/main/resources/db/changelog/db.changelog-master.yaml
+++ b/src/main/resources/db/changelog/db.changelog-master.yaml
@@ -35,3 +35,6 @@ databaseChangeLog:
   - include:
       file: changesets/changelog_20250820T000000Z.xml
       relativeToChangelogFile: true
+  - include:
+      file: changesets/changelog_20251031T110224Z.xml
+      relativeToChangelogFile: true