diff --git a/dockerfile b/dockerfile
index 3bb6f54..4861364 100644
--- a/dockerfile
+++ b/dockerfile
@@ -29,7 +29,8 @@ RUN apt update && DEBIAN_FRONTEND=noninteractive apt -y --no-install-recommends
 RUN curl https://repo.dovecot.org/DOVECOT-REPO-GPG | gpg --import && \
     gpg --export ED409DA1 > /etc/apt/trusted.gpg.d/dovecot.gpg
 
-RUN echo "deb https://repo.dovecot.org/ce-2.3-latest/debian/bullseye bullseye main" > /etc/apt/sources.list.d/dovecot.list
+#RUN echo "deb https://repo.dovecot.org/ce-2.3-latest/debian/bullseye bullseye main" > /etc/apt/sources.list.d/dovecot.list
+RUN echo "deb https://repo.dovecot.org/ce-2.3.18/debian/bullseye bullseye main" > /etc/apt/sources.list.d/dovecot.list
 
 RUN apt update && DEBIAN_FRONTEND=noninteractive apt -y --no-install-recommends install \
         # System Apps