diff --git a/images/dovecot/Dockerfile b/images/dovecot/Dockerfile
index 228852a7042e8207bf294357d8dd622824d1ad98..7dc7730b4607db2dfe4ab1584f74c881920a2af2 100644
--- a/images/dovecot/Dockerfile
+++ b/images/dovecot/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/library/alpine:3.16.2
+FROM docker.io/library/alpine:3.16.3
 
 # Update base system
 RUN apk update
diff --git a/images/postfix/Dockerfile b/images/postfix/Dockerfile
index 4a108674e8e98795f0cdad3384f7fba0dcf42294..7210ee23c2e616bad70714ae334bad7b7afc527e 100644
--- a/images/postfix/Dockerfile
+++ b/images/postfix/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/library/alpine:3.16.2
+FROM docker.io/library/alpine:3.16.3
 
 # Install pre-requirements
 RUN apk update