diff --git a/Dockerfile b/Dockerfile
index fcf9c49b9..0e08e72da 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # syntax=docker/dockerfile:1.2
-FROM alpine:3.21
+FROM alpine:3.22
 
 RUN apk add --no-cache --no-progress ca-certificates tzdata
 
diff --git a/docs/check.Dockerfile b/docs/check.Dockerfile
index 41a389f69..2a03cf8af 100644
--- a/docs/check.Dockerfile
+++ b/docs/check.Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.21
+FROM alpine:3.22
 
 RUN apk --no-cache --no-progress add \
     build-base \
@@ -9,9 +9,7 @@ RUN apk --no-cache --no-progress add \
     ruby \
     ruby-bigdecimal \
     ruby-dev \
-    ruby-etc \
     ruby-ffi \
-    ruby-json \
     zlib-dev
 
 RUN gem install nokogiri --version 1.18.6 --no-document -- --use-system-libraries
diff --git a/docs/docs.Dockerfile b/docs/docs.Dockerfile
index e15440a36..99e963cf4 100644
--- a/docs/docs.Dockerfile
+++ b/docs/docs.Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.21
+FROM alpine:3.22
 
 ENV PATH="${PATH}:/venv/bin"