diff --git a/27-rc/cli/Dockerfile b/27-rc/cli/Dockerfile
index b0c55285d..183f07460 100644
--- a/27-rc/cli/Dockerfile
+++ b/27-rc/cli/Dockerfile
@@ -4,7 +4,7 @@
 # PLEASE DO NOT EDIT IT DIRECTLY.
 #
 
-FROM alpine:3.20
+FROM alpine:3.21
 
 RUN apk add --no-cache \
 		ca-certificates \
diff --git a/27/cli/Dockerfile b/27/cli/Dockerfile
index 0bcc9c49f..9b3e9f870 100644
--- a/27/cli/Dockerfile
+++ b/27/cli/Dockerfile
@@ -4,7 +4,7 @@
 # PLEASE DO NOT EDIT IT DIRECTLY.
 #
 
-FROM alpine:3.20
+FROM alpine:3.21
 
 RUN apk add --no-cache \
 		ca-certificates \
diff --git a/Dockerfile-cli.template b/Dockerfile-cli.template
index 5b9eb2ac0..c47397831 100644
--- a/Dockerfile-cli.template
+++ b/Dockerfile-cli.template
@@ -1,5 +1,5 @@
 {{ include "shared" -}}
-FROM alpine:3.20
+FROM alpine:3.21
 
 RUN apk add --no-cache \
 		ca-certificates \