diff --git a/.travis.yml b/.travis.yml
index 07c574b..c71dfb2 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,24 +7,17 @@ matrix:
     - rust: beta
     - rust: nightly
       env: BENCHES=true
-    - rust: 1.24.0
     - rust: 1.22.0
-      env: ONLY_LOW_MEMORY=true
 
 before_install:
   - sudo apt-get -qq update
   - sudo apt-get install -y binutils-dev libunwind8-dev
 
 script:
-  - if not ${ONLY_LOW_MEMORY}; then cargo build --verbose; fi
-  - if not ${ONLY_LOW_MEMORY}; then cargo test --verbose; fi
-  - if not ${ONLY_LOW_MEMORY}; then cargo build --verbose --features rand,all-languages; fi
-  - if not ${ONLY_LOW_MEMORY}; then cargo test --verbose --features rand,all-languages; fi
-  # low-memory
-  - cargo build --verbose --features low-memory
-  - cargo test --verbose --features low-memory
-  - cargo build --verbose --features low-memory,rand,all-languages
-  - cargo test --verbose --features low-memory,rand,all-languages
+  - cargo build --verbose
+  - cargo test --verbose
+  - cargo build --verbose --features rand,all-languages
+  - cargo test --verbose --features rand,all-languages
   # benchmarks
   - if ${BENCHES}; then cargo bench --verbose --features rand; fi
   - if ${BENCHES}; then cargo bench --verbose --features rand,japanese; fi
diff --git a/README.md b/README.md
index 0a92f36..b6d8cc1 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,5 @@ A Rust implementation of BIP-39 mnemonic codes.
 
 ## MSRV
 
-This crate supports Rust v1.24 and up.
-With the `low-memory` feature, v1.22 and up are supported.
+This crate supports Rust v1.22 and up.