diff --git a/Dockerfile b/Dockerfile
index 3dc899a..def14c9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,15 +17,15 @@ RUN apk --no-cache add \
     icu-dev \
     inotify-tools-dev
 
-ENV SHA256_SUM_DOVECOT=11e156ae8539e42892809cc2412c3f1a294188806969f5547191a43abd4083aa
-ENV DOVECOT_FILENAME=dovecot-2.3.7.tar.gz
+ENV SHA256_SUM_DOVECOT=4784fb98dd41b83888e4aa9908efcbcad2e04a254e97440863903c0c498486f9
+ENV DOVECOT_FILENAME=dovecot-2.3.9.2.tar.gz
 RUN wget https://www.dovecot.org/releases/2.3/$DOVECOT_FILENAME
 RUN echo "$SHA256_SUM_DOVECOT  $DOVECOT_FILENAME" | sha256sum -c - || exit 1
 RUN mkdir /tmp/dovecot
 RUN tar xzf $DOVECOT_FILENAME -C /tmp/dovecot --strip 1
 
-ENV SHA256_SUM_PIGEONHOLE=783849542c272331f60e7c4d371b303f7f2b1d69828bced3094a898876ecdb63
-ENV PIGEONHOLE_FILENAME=dovecot-2.3-pigeonhole-0.5.7.tar.gz
+ENV SHA256_SUM_PIGEONHOLE=36da68aae5157b83e21383f711b8977e5b6f5477f369f71e7e22e76a738bbd05
+ENV PIGEONHOLE_FILENAME=dovecot-2.3-pigeonhole-0.5.9.tar.gz
 RUN wget https://pigeonhole.dovecot.org/releases/2.3/$PIGEONHOLE_FILENAME
 RUN echo "$SHA256_SUM_PIGEONHOLE  $PIGEONHOLE_FILENAME" | sha256sum -c - || exit 1
 RUN mkdir /tmp/pigeonhole