diff --git a/build.gradle b/build.gradle
index 1e87bd5399..99c8fc2ad9 100644
--- a/build.gradle
+++ b/build.gradle
@@ -402,7 +402,7 @@ dependencies {
   implementation group: 'com.github.hmcts.java-logging', name: 'logging', version: '8.0.0'
   implementation group: 'com.github.hmcts', name: 'core-case-data-store-client', version: '5.3.0'
   // Compile-time only: needed for IdamApi.class reference in @EnableFeignClients (ccd-sdk's IdamClient depends on it).
-  implementation group: 'com.github.hmcts', name: 'idam-java-client', version: '3.0.5'
+  implementation group: 'com.github.hmcts', name: 'idam-java-client', version: '4.0.0'
   implementation group: 'com.github.hmcts', name: 'doc-assembly-client', version: '2.2.0'
   implementation group: 'com.github.hmcts', name: 'ccd-case-document-am-client', version: '1.59.2'
   implementation group: 'com.github.hmcts', name: 'send-letter-client', version: '5.1.1'