diff --git a/Dockerfile b/Dockerfile
index 30f2cc2..bedeefc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 ################
 ##### Builder
-FROM rust:1.82.0-slim AS builder
+FROM rust:1.85.0-slim AS builder
 
 WORKDIR /usr/src
 
@@ -20,7 +20,7 @@ RUN cargo build --package server --target x86_64-unknown-linux-musl --release
 
 ################
 ##### Runtime
-FROM alpine:3.20.3 AS runtime
+FROM alpine:3.21.3 AS runtime
 
 # Copy application binary from builder image
 COPY --from=builder /usr/src/target/x86_64-unknown-linux-musl/release/saslauthd /usr/local/bin