diff --git a/Dockerfile b/Dockerfile
index 2460d41..4915d80 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@
 # To create a multi-arch image, run:
 # docker buildx build --platform linux/amd64,linux/arm64 --tag elasticsearch-core-mcp-server .
 
-FROM rust:1.89@sha256:c50cd6e20c46b0b36730b5eb27289744e4bb8f32abc90d8c64ca09decf4f55ba AS builder
+FROM rust:1.91@sha256:4a29b0db5c961cd530f39276ece3eb6e66925b59599324c8c19723b72a423615 AS builder
 
 WORKDIR /app
 
diff --git a/Dockerfile-8000 b/Dockerfile-8000
index 5c2c420..6e09640 100644
--- a/Dockerfile-8000
+++ b/Dockerfile-8000
@@ -5,7 +5,7 @@
 # To create a multi-arch image, run:
 # docker buildx build --platform linux/amd64,linux/arm64 --tag elasticsearch-core-mcp-server .
 
-FROM rust:1.89@sha256:c50cd6e20c46b0b36730b5eb27289744e4bb8f32abc90d8c64ca09decf4f55ba AS builder
+FROM rust:1.91@sha256:4a29b0db5c961cd530f39276ece3eb6e66925b59599324c8c19723b72a423615 AS builder
 
 WORKDIR /app