diff --git a/images/dovecot/Dockerfile b/images/dovecot/Dockerfile
index 56abb9eb7e2a2ea3a37e36831e299c9a0f8584dc..911072456e5ce7a0530e669aeb92446f2c90a803 100644
--- a/images/dovecot/Dockerfile
+++ b/images/dovecot/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/library/alpine:3.17.2
+FROM docker.io/library/alpine:3.17.3
 
 # Update base system
 RUN apk update
diff --git a/images/postfix/Dockerfile b/images/postfix/Dockerfile
index 5f4aa49fa63b7fdc764a883e31222b48aa922846..ecef44e852ecf1c951ef2e9d0ddda6194b989d6e 100644
--- a/images/postfix/Dockerfile
+++ b/images/postfix/Dockerfile
@@ -1,11 +1,11 @@
-FROM docker.io/library/alpine:3.17.2 as dhparam
+FROM docker.io/library/alpine:3.17.3 as dhparam
 
 RUN apk add --no-cache openssl
 
 RUN mkdir -p /etc/postfix
 RUN openssl dhparam -out /etc/postfix/postfix_dhparams.pem 2048
 
-FROM docker.io/library/alpine:3.17.2
+FROM docker.io/library/alpine:3.17.3
 
 # Install pre-requirements
 RUN apk add --no-cache ca-certificates rsyslog supervisor