diff --git a/ci/docker-rust-nightly/Dockerfile b/ci/docker-rust-nightly/Dockerfile
index 4f48ff57cc..9b9be716e9 100644
--- a/ci/docker-rust-nightly/Dockerfile
+++ b/ci/docker-rust-nightly/Dockerfile
@@ -1,9 +1,10 @@
 FROM solanalabs/rust
-ARG nightly=nightly-2018-08-14
+ARG nightly=nightly-2018-09-03
 
 RUN set -x && \
     rustup install $nightly && \
     rustup default $nightly && \
     rustup component add clippy-preview --toolchain=$nightly && \
     rustc --version && \
-    cargo --version
+    cargo --version && \
+    cargo +$nightly install cargo-cov