diff --git a/Dockerfile b/Dockerfile
index 53601ea..5fb8c4d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,7 +8,7 @@ COPY frontend ./
 RUN npm run build
 
 # --- Backend build stage ---
-FROM rust:1.90-bookworm as backend-builder
+FROM rust:1.91-bookworm as backend-builder
 
 # Install system dependencies for OCR and PDF processing
 RUN apt-get update && apt-get install -y \
diff --git a/Dockerfile.dev b/Dockerfile.dev
index 9286ed7..31db8f9 100644
--- a/Dockerfile.dev
+++ b/Dockerfile.dev
@@ -1,5 +1,5 @@
 # Development Dockerfile with hot-reloading support for Rust backend
-FROM rust:1.90-bookworm
+FROM rust:1.91-bookworm
 
 # Install system dependencies for OCR and PDF processing
 RUN apt-get update && apt-get install -y \
diff --git a/Dockerfile.stress b/Dockerfile.stress
index ec8d362..45e8793 100644
--- a/Dockerfile.stress
+++ b/Dockerfile.stress
@@ -1,5 +1,5 @@
 # Multi-stage Dockerfile for WebDAV Stress Testing
-FROM rust:1.90-alpine AS builder
+FROM rust:1.91-alpine AS builder
 
 # Install build dependencies
 RUN apk add --no-cache \