diff --git a/Dockerfile b/Dockerfile
index 15dd284..8b9b8dc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # Docker 17.05 or higher required for multi-stage builds
 # NOTE: this builds w/ a nightly version (specified in rust-toolchain)
-FROM rust:1.40.0-buster as builder
+FROM rust:1.45-buster as builder
 
 ADD . /app
 WORKDIR /app