diff --git a/rust/rocket/Dockerfile b/rust/rocket/Dockerfile
index ae6a07cd98a..80da84456fb 100644
--- a/rust/rocket/Dockerfile
+++ b/rust/rocket/Dockerfile
@@ -2,7 +2,7 @@ FROM rust
 
 WORKDIR /usr/src/app
 
-RUN rustup default nightly-2018-06-05
+RUN rustup default nightly
 
 COPY Cargo.toml ./
 COPY src src