diff --git a/Dockerfile b/Dockerfile
index 607024f..6acc65c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,20 +1,20 @@
-FROM docker.io/alpine:3.16 as builder
+FROM docker.io/alpine:3.17 as builder
 
 RUN apk --no-cache add \
-    rpcgen \
-    g++ \
-    make \
-    openssl \
-    openssl-dev \
-    lua-dev \
-    libsodium-dev \
-    linux-pam-dev \
-    zlib-dev \
-    bzip2-dev \
-    xz-dev \
-    lz4-dev \
-    icu-dev \
-    inotify-tools-dev
+  rpcgen \
+  g++ \
+  make \
+  openssl \
+  openssl-dev \
+  lua-dev \
+  libsodium-dev \
+  linux-pam-dev \
+  zlib-dev \
+  bzip2-dev \
+  xz-dev \
+  lz4-dev \
+  icu-dev \
+  inotify-tools-dev
 
 ENV SHA256_SUM_DOVECOT=db5abcd87d7309659ea6b45b2cb6ee9c5f97486b2b719a5dd05a759e1f6a5c51
 ENV DOVECOT_FILENAME=dovecot-2.3.19.1.tar.gz