diff --git a/core/Dockerfile b/core/Dockerfile
index 886305f..7fccfda 100644
--- a/core/Dockerfile
+++ b/core/Dockerfile
@@ -1,6 +1,6 @@
 # syntax = docker/dockerfile:1.3
 # Use 3.15 for Core since it has Python 3.9
-FROM alpine:3.20
+FROM alpine:3.21
 
 # Add requirements file.
 COPY requirements.txt /tmp/
diff --git a/core/Dockerfile.dev b/core/Dockerfile.dev
index 37f2da9..d236656 100644
--- a/core/Dockerfile.dev
+++ b/core/Dockerfile.dev
@@ -1,6 +1,6 @@
 # syntax = docker/dockerfile:1.3
 # Use 3.15 for Core since it has Python 3.9
-FROM alpine:3.20
+FROM alpine:3.21
 
 # Set the commits that we are building.
 ARG CORE_REF