diff --git a/build.gradle b/build.gradle
index 2cf2885b..a914bad9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -90,7 +90,7 @@ dependencies {
 
     implementation group: 'com.github.hmcts', name: 'core-case-data-store-client', version: '5.0.3'
     implementation group: 'com.github.hmcts', name: 'ecm-data-model', version: '1.3.12'
-    implementation group: 'com.github.hmcts', name: 'et-data-model', version: '3.18.21'
+    implementation group: 'com.github.hmcts', name: 'et-data-model', version: '4.0.1'
 
     implementation group: 'com.github.hmcts.java-logging', name: 'logging', version: reformLoggingVersion
     implementation group: 'com.github.hmcts.java-logging', name: 'logging-appinsights', version: reformLoggingVersion