diff --git a/Dockerfile b/Dockerfile
index 0f601d2..0b77576 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # ---- build stage ----
-FROM golang:1.24-alpine AS builder
+FROM golang:1.25-alpine AS builder
 
 WORKDIR /app
 
diff --git a/deploy/prod/Dockerfile.slim b/deploy/prod/Dockerfile.slim
index f349cfc..6b212cc 100644
--- a/deploy/prod/Dockerfile.slim
+++ b/deploy/prod/Dockerfile.slim
@@ -13,7 +13,7 @@
 # testnet validator.
 
 # ---- build stage ----
-FROM golang:1.24-alpine AS builder
+FROM golang:1.25-alpine AS builder
 WORKDIR /app
 
 COPY go.mod go.sum ./
diff --git a/docker/media-sidecar/Dockerfile b/docker/media-sidecar/Dockerfile
index 660dd77..5c6a506 100644
--- a/docker/media-sidecar/Dockerfile
+++ b/docker/media-sidecar/Dockerfile
@@ -5,7 +5,7 @@
 # Compose: see docker-compose.yml; node points DCHAIN_MEDIA_SIDECAR_URL at it.
 #
 # Stage 1 — build a tiny static Go binary.
-FROM golang:1.22-alpine AS build
+FROM golang:1.25-alpine AS build
 WORKDIR /src
 # Copy only what we need (the sidecar main is self-contained, no module
 # deps on the rest of the repo, so this is a cheap, cache-friendly build).