diff --git a/parser/.travis.yml b/parser/.travis.yml
index f3e89e1..89e430a 100644
--- a/parser/.travis.yml
+++ b/parser/.travis.yml
@@ -1,9 +1,12 @@
 language: rust
 rust:
-        - 1.0.0
-        - 1.1.0
-        - 1.5.0
-        - nightly
+  - 1.8.0
+  - 1.16.0
+  - beta
+  - nightly
+matrix:
+  allow_failures:
+    - rust: nightly
 env:
   global:
     - secure: 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
diff --git a/parser/appveyor.yml b/parser/appveyor.yml
index fc72b1e..5ee211c 100644
--- a/parser/appveyor.yml
+++ b/parser/appveyor.yml
@@ -1,6 +1,6 @@
 install:
-  - ps: Start-FileDownload 'https://static.rust-lang.org/dist/rust-nightly-i686-pc-windows-gnu.exe'
-  - rust-nightly-i686-pc-windows-gnu.exe /VERYSILENT /NORESTART /DIR="C:\Program Files (x86)\Rust"
+  - ps: Start-FileDownload 'https://static.rust-lang.org/dist/rust-1.16.0-i686-pc-windows-gnu.exe'
+  - rust-1.16.0-i686-pc-windows-gnu.exe /VERYSILENT /NORESTART /DIR="C:\Program Files (x86)\Rust"
   - SET PATH=%PATH%;C:\Program Files (x86)\Rust\bin
   - SET PATH=%PATH%;C:\MinGW\bin
   - rustc -V
diff --git a/parser/src/emitter.rs b/parser/src/emitter.rs
index e56fc14..9cd6a2d 100644
--- a/parser/src/emitter.rs
+++ b/parser/src/emitter.rs
@@ -1,6 +1,6 @@
 use std::fmt;
 use std::convert::From;
-use yaml::*;
+use yaml::Yaml;
 
 #[derive(Copy, Clone, Debug)]
 pub enum EmitError {
diff --git a/parser/src/yaml.rs b/parser/src/yaml.rs
index d9f63d4..cd8ebb1 100644
--- a/parser/src/yaml.rs
+++ b/parser/src/yaml.rs
@@ -2,7 +2,6 @@ use std::collections::BTreeMap;
 use std::ops::Index;
 use std::string;
 use std::i64;
-use std::str::FromStr;
 use std::mem;
 use std::vec;
 use parser::*;