diff --git a/images/openwisp_nginx/Dockerfile b/images/openwisp_nginx/Dockerfile
index 3475bc20..a3ac3c84 100644
--- a/images/openwisp_nginx/Dockerfile
+++ b/images/openwisp_nginx/Dockerfile
@@ -1,10 +1,11 @@
 FROM nginx:1.29.0-alpine
 
+# hadolint ignore=DL3018
 RUN apk add --update --no-cache \
-            openssl~=3.5.3-r1 \
             py3-pip~=25.1.1-r0 \
             certbot~=4.0.0-r0 \
-            certbot-nginx~=4.0.0-r1 && \
+            certbot-nginx~=4.0.0-r1 \
+            openssl && \
     rm -rf /var/cache/apk/* /tmp/*
 
 WORKDIR /etc/nginx/
diff --git a/images/openwisp_postfix/Dockerfile b/images/openwisp_postfix/Dockerfile
index 5e8da5ca..c78da655 100644
--- a/images/openwisp_postfix/Dockerfile
+++ b/images/openwisp_postfix/Dockerfile
@@ -1,10 +1,11 @@
 FROM alpine:3.22
 
 WORKDIR /opt/openwisp/
+# hadolint ignore=DL3018
 RUN apk add --no-cache --upgrade \
-            openssl~=3.5.3-r1 \
             cyrus-sasl~=2.1.28-r8	\
-            cyrus-sasl-login~=2.1.28-r8 && \
+            cyrus-sasl-login~=2.1.28-r8 \
+            openssl && \
     apk add --no-cache \
             postfix~=3.10.4-r0 \
             rsyslog~=8.2410.0-r1 \