diff --git a/.travis.yml b/.travis.yml
index de48f45..86709ff 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -14,7 +14,6 @@ addons:
     - binutils-dev
     - g++-4.7
 rvm:
- - 1.9.3
  - 2.0
  - 2.1
  - 2.2
@@ -25,10 +24,10 @@ matrix:
     - os: osx
   include:
     - os: osx
-      rvm: 1.9.3
+      rvm: 2.0
   allow_failures:
     - os: osx
-      rvm: 1.9.3
+      rvm: 2.0
 
 install:
   - export RUBY_SOURCE_DIR=`pwd`
diff --git a/README.md b/README.md
index fead5a7..99b4610 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,8 @@ Ruby wrappers gem for SymEngine, a fast symbolic manipulation library, written i
 
 - libsymengine        - See build [instructions](https://github.com/symengine/symengine/wiki/Building-SymEngine)
 
+- ruby >= 2.0.0       - Needs Ruby shared library and headers
+
 #### Installing
 
 - Simply do,