diff --git a/.travis.yml b/.travis.yml
index 3fcfbc8..321d17e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,8 @@ language: go
 
 go:
   - "1.14.x"
+  - "1.15.x"
+  - master
 
 sudo: false
 
diff --git a/README.md b/README.md
index d74bcd9..1cc5bc1 100644
--- a/README.md
+++ b/README.md
@@ -5,9 +5,9 @@
 
 This is a **SM2 sm2p256v1** implementation whose performance is similar like golang native NIST P256 under **amd64**, for implementation detail, please refer [SM2实现细节](https://github.com/emmansun/gmsm/wiki/SM2%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96).
 
-This is also a **SM3** implementation whose performance is similar like golang native SHA 256 under **amd64**, for implementation detail, please refer [SM3性能优化](https://github.com/emmansun/gmsm/wiki/SM3%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96).
+This is also a **SM3** implementation whose performance is similar like golang native SHA 256 with SIMD under **amd64**, for implementation detail, please refer [SM3性能优化](https://github.com/emmansun/gmsm/wiki/SM3%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96).
 
-For **SM4** implementation, AES-NI is used under **amd64**, for detail please refer [SM4性能优化](https://github.com/emmansun/gmsm/wiki/SM4%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96), support CBC/CFB/OFB/CTR/GCM/CCM/XTS modes.
+For **SM4** implementation, SIMD & AES-NI are used under **amd64**, for detail please refer [SM4性能优化](https://github.com/emmansun/gmsm/wiki/SM4%E6%80%A7%E8%83%BD%E4%BC%98%E5%8C%96), support CBC/CFB/OFB/CTR/GCM/CCM/XTS modes.
 
 **SM2 encryption Benchmark**