diff --git a/docker/Dockerfile b/docker/Dockerfile
index 2cf89424..8b887e8f 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -7,7 +7,7 @@
 #
 # Tested with: OrbStack (recommended on macOS), Docker Desktop (slower bind mounts)
 
-FROM rust:1.90-bookworm AS base
+FROM rust:1.93-bookworm AS base
 
 # Clippy and rustfmt are needed at runtime for acceptance gates
 RUN rustup component add clippy rustfmt