diff --git a/images/dovecot/Dockerfile b/images/dovecot/Dockerfile
index 911072456e5ce7a0530e669aeb92446f2c90a803..149773879a2fd5534db730e0f668ab2c9df6cd59 100644
--- a/images/dovecot/Dockerfile
+++ b/images/dovecot/Dockerfile
@@ -1,4 +1,4 @@
-FROM docker.io/library/alpine:3.17.3
+FROM docker.io/library/alpine:3.18.2
 
 # Update base system
 RUN apk update
diff --git a/images/postfix/Dockerfile b/images/postfix/Dockerfile
index bc778f2dd00d5b26bef9c50202302b1e76dcabc2..fa084332b4d5cdddcfe4d6f75865bc99c568b530 100644
--- a/images/postfix/Dockerfile
+++ b/images/postfix/Dockerfile
@@ -1,11 +1,11 @@
-FROM docker.io/library/alpine:3.17.3 as dhparam
+FROM docker.io/library/alpine:3.18.2 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:3.17.3
+FROM docker.io/library/alpine:3.18.2
 
 # Install pre-requirements
 RUN apk add --no-cache ca-certificates rsyslog supervisor