diff --git a/Dockerfile b/Dockerfile
index 2a20e7c527fc..b0f67afae00e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,7 +3,7 @@ ARG APP_INSIGHTS_AGENT_VERSION=3.4.15
 
 # Application image
 
-FROM hmctspublic.azurecr.io/base/java:17-distroless
+FROM hmctspublic.azurecr.io/base/java:21-distroless
 
 # Change to non-root privilege
 USER hmcts