diff --git a/playground/Dockerfile b/playground/Dockerfile
index 541f8bb5..664677a1 100644
--- a/playground/Dockerfile
+++ b/playground/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.11 as builder
+FROM alpine:3.17 as builder
 
 RUN apk add --no-cache \
         git make
diff --git a/ssl/Dockerfile b/ssl/Dockerfile
index ddf536f5..1121e7c2 100644
--- a/ssl/Dockerfile
+++ b/ssl/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.11
+FROM alpine:3.17
 
 ENV CODE_VERSION=1.2.0 \
     PKI_ROOT=/kopano/easypki \