diff --git a/Dockerfile b/Dockerfile
index ff72d3f..d6f6a35 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:18-alpine AS base
+FROM node:21-alpine AS base
 
 # This Dockerfile is copy-pasted into our main docs at /docs/handbook/deploying-with-docker.
 # Make sure you update both files!
diff --git a/Dockerfile.solo b/Dockerfile.solo
index 8b1fb98..a1d61a7 100644
--- a/Dockerfile.solo
+++ b/Dockerfile.solo
@@ -1,4 +1,4 @@
-FROM node:18-alpine AS base
+FROM node:21-alpine AS base
 
 # This Dockerfile is copy-pasted into our main docs at /docs/handbook/deploying-with-docker.
 # Make sure you update both files!