diff --git a/.travis.yml b/.travis.yml
index cdaf17e..cd03564 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -8,7 +8,7 @@ os:
 rust:
   # Requires nightly for now, stable can be re-enabled when 1.36 is stable.
   # - stable
-  - nightly
+  - nightly-2019-05-22
 env:
   global:
     - RUST_BACKTRACE=1
diff --git a/README.md b/README.md
index 034f247..b09948a 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # TiKV Client (Rust)
 
-[![Build Status](https://travis-ci.org/tikv/client-rust.svg?branch=master)](https://travis-ci.org/pingcap/client-rust)
+[![Build Status](https://travis-ci.org/tikv/client-rust.svg?branch=master)](https://travis-ci.org/tikv/client-rust)
 [![Documentation](https://docs.rs/tikv-client/badge.svg)](https://docs.rs/tikv-client/)
 
 > Currently this crate is experimental and some portions (e.g. the Transactional API) are still in active development. You're encouraged to use this library for testing and to help us find problems!
diff --git a/rust-toolchain b/rust-toolchain
new file mode 100644
index 0000000..f677ace
--- /dev/null
+++ b/rust-toolchain
@@ -0,0 +1 @@
+nightly-2019-05-22