diff --git a/1.22/alpine3.19/Dockerfile b/1.22/alpine3.21/Dockerfile
similarity index 99%
rename from 1.22/alpine3.19/Dockerfile
rename to 1.22/alpine3.21/Dockerfile
index c350ca32..a5e2e0fb 100644
--- a/1.22/alpine3.19/Dockerfile
+++ b/1.22/alpine3.21/Dockerfile
@@ -4,7 +4,7 @@
 # PLEASE DO NOT EDIT IT DIRECTLY.
 #
 
-FROM alpine:3.19 AS build
+FROM alpine:3.21 AS build
 
 ENV PATH /usr/local/go/bin:$PATH
 
@@ -110,7 +110,7 @@ RUN set -eux; \
 	[ "$SOURCE_DATE_EPOCH" = "$epoch" ]; \
 	find /target -newer /target/usr/local/go -exec sh -c 'ls -ld "$@" && exit "$#"' -- '{}' +
 
-FROM alpine:3.19
+FROM alpine:3.21
 
 RUN apk add --no-cache ca-certificates
 
diff --git a/1.23/alpine3.19/Dockerfile b/1.23/alpine3.21/Dockerfile
similarity index 99%
rename from 1.23/alpine3.19/Dockerfile
rename to 1.23/alpine3.21/Dockerfile
index 3e601452..fa4bc73f 100644
--- a/1.23/alpine3.19/Dockerfile
+++ b/1.23/alpine3.21/Dockerfile
@@ -4,7 +4,7 @@
 # PLEASE DO NOT EDIT IT DIRECTLY.
 #
 
-FROM alpine:3.19 AS build
+FROM alpine:3.21 AS build
 
 ENV PATH /usr/local/go/bin:$PATH
 
@@ -110,7 +110,7 @@ RUN set -eux; \
 	[ "$SOURCE_DATE_EPOCH" = "$epoch" ]; \
 	find /target -newer /target/usr/local/go -exec sh -c 'ls -ld "$@" && exit "$#"' -- '{}' +
 
-FROM alpine:3.19
+FROM alpine:3.21
 
 RUN apk add --no-cache ca-certificates
 
diff --git a/versions.json b/versions.json
index 2cbbad81..407c76b3 100644
--- a/versions.json
+++ b/versions.json
@@ -392,8 +392,8 @@
     "variants": [
       "bookworm",
       "bullseye",
+      "alpine3.21",
       "alpine3.20",
-      "alpine3.19",
       "windows/windowsservercore-ltsc2022",
       "windows/windowsservercore-1809",
       "windows/nanoserver-ltsc2022",
@@ -804,8 +804,8 @@
     "variants": [
       "bookworm",
       "bullseye",
+      "alpine3.21",
       "alpine3.20",
-      "alpine3.19",
       "windows/windowsservercore-ltsc2022",
       "windows/windowsservercore-1809",
       "windows/nanoserver-ltsc2022",
diff --git a/versions.sh b/versions.sh
index e3f857e4..86549fae 100755
--- a/versions.sh
+++ b/versions.sh
@@ -162,8 +162,8 @@ for version in "${versions[@]}"; do
 			"bookworm",
 			"bullseye",
 			(
+				"3.21",
 				"3.20",
-				"3.19",
 				empty
 			| "alpine" + .),
 			if .arches | has("windows-amd64") and .["windows-amd64"].url then