diff --git a/.travis.yml b/.travis.yml
index 22abadc..50a563a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,7 +9,7 @@ matrix:
       env: BENCHES=false
     - rust: nightly
       env: BENCHES=true
-    - rust: 1.22.0
+    - rust: 1.29.0
       env: BENCHES=false
 
 before_install:
@@ -19,6 +19,8 @@ before_install:
 script:
   - cargo build --verbose
   - cargo test --verbose
+  - cargo build --verbose --no-default-features
+  - cargo test --verbose --no-default-features
   - cargo build --verbose --features rand,all-languages
   - cargo test --verbose --features rand,all-languages
   # benchmarks
diff --git a/README.md b/README.md
index 6034c06..631ec0b 100644
--- a/README.md
+++ b/README.md
@@ -28,5 +28,5 @@ Use the `all-languages` feature to enable all languages.
 
 ## MSRV
 
-This crate supports Rust v1.22 and up.
+This crate supports Rust v1.29 and up.