diff --git a/Dockerfile.rcs-fakesmtp b/Dockerfile.rcs-fakesmtp
index 3fe8e3918..9e121d497 100644
--- a/Dockerfile.rcs-fakesmtp
+++ b/Dockerfile.rcs-fakesmtp
@@ -1,4 +1,4 @@
-FROM eclipse-temurin:21.0.5_11-jdk-alpine@sha256:c4e39b956750b52fdf49c93d51a63546a5e91b22224fc462e58b00be91b17b62
+FROM eclipse-temurin:21.0.5_11-jdk-alpine@sha256:56ffb38891c7ea074c1dd42cc9a978206b7c2752589f8f613e383050a8af0e50
 
 ADD https://nilhcem.github.io/FakeSMTP/downloads/fakeSMTP-latest.zip /fakeSMTP-latest.zip
 RUN unzip /fakeSMTP-latest.zip