diff --git a/service_cpu.Dockerfile b/service_cpu.Dockerfile
index d4b30231a0..f798756e4b 100644
--- a/service_cpu.Dockerfile
+++ b/service_cpu.Dockerfile
@@ -9,7 +9,7 @@
 FROM ubuntu:jammy as rust-base
 
 # NB: This can be "stable" or another version.
-ARG RUST_TOOLCHAIN="1.66.0"
+ARG RUST_TOOLCHAIN="1.73.0"
 
 WORKDIR /tmp
 
diff --git a/service_gpu.Dockerfile b/service_gpu.Dockerfile
index 413feb3178..89a0e9c48c 100644
--- a/service_gpu.Dockerfile
+++ b/service_gpu.Dockerfile
@@ -9,7 +9,7 @@
 FROM ubuntu:jammy as rust-base
 
 # NB: This can be "stable" or another version.
-ARG RUST_TOOLCHAIN="1.66.0"
+ARG RUST_TOOLCHAIN="1.73.0"
 
 WORKDIR /tmp