diff --git a/service_cpu.Dockerfile b/service_cpu.Dockerfile
index f4af24bdf2..abd1cec76b 100644
--- a/service_cpu.Dockerfile
+++ b/service_cpu.Dockerfile
@@ -5,7 +5,7 @@
 FROM ubuntu:jammy as rust-base
 
 # NB: This can be "stable" or another version.
-ARG RUST_TOOLCHAIN="1.73.0"
+ARG RUST_TOOLCHAIN="1.78.0"
 
 WORKDIR /tmp
 
diff --git a/service_gpu.Dockerfile b/service_gpu.Dockerfile
index bc2159be58..f085cb5df1 100644
--- a/service_gpu.Dockerfile
+++ b/service_gpu.Dockerfile
@@ -5,7 +5,7 @@
 FROM ubuntu:jammy as rust-base
 
 # NB: This can be "stable" or another version.
-ARG RUST_TOOLCHAIN="1.73.0"
+ARG RUST_TOOLCHAIN="1.78.0"
 
 WORKDIR /tmp