diff --git a/.dockerignore b/.dockerignore
index aa160688860..151898ca7dc 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,5 +1,5 @@
 tests/ef_tests/eth2.0-spec-tests
 target/
-*.tar.gz
 *.data
+*.tar.gz
 .git
diff --git a/Dockerfile b/Dockerfile
index 5fab5a6a735..1a19ddee3f0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM rust:1.39.0 AS builder
+FROM rust:1.40.0 AS builder
 COPY . lighthouse
 RUN cd lighthouse && make && cargo clean