diff --git a/.travis.yml b/.travis.yml
index 39b1206..3792d31 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,25 +1,38 @@
 language: ruby
 sudo: false
+os:
+  - linux
+  - osx
 addons:
   apt:
+    sources:
+    - ubuntu-toolchain-r-test
     packages:
     - libgmp-dev
     - libmpfr-dev
     - libmpc-dev
     - binutils-dev
+    - g++-4.7
 rvm:
  - 1.9.3
  - 2.0
  - 2.1
  - 2.2
 
+matrix:
+  exclude:
+    - os: osx
+  include:
+    - os: osx
+      rvm: 1.9.3
+
 install:
   - export RUBY_SOURCE_DIR=`pwd`
   - export TEST_CPP="no"
 
   - git clone https://github.com/symengine/symengine symengine-cpp
   - cd symengine-cpp
-  - git checkout 8537c67507fae9b1d8d575d322c6ade4f1a59297
+  - git checkout `cat ../symengine_version.txt`
 
   # Setup travis for C++ library
   - source bin/install_travis.sh
diff --git a/appveyor.yml b/appveyor.yml
index 5491b2b..810a16b 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -31,9 +31,10 @@ install:
   - 7z x -oC:\gmp gmp.7z > NUL
   - set PATH=C:\gmp\bin\;%PATH%
 
+  - set /p commit=<symengine_version.txt
   - git clone https://github.com/symengine/symengine symengine-cpp
-  - cd symengine-cpp
-  - git checkout 8537c67507fae9b1d8d575d322c6ade4f1a59297
+  - cd symengine-cpp  
+  - git checkout %commit%
   - cmake -G "MSYS Makefiles" -DGMP_DIR=C:\gmp -DBUILD_TESTS=no -DBUILD_BENCHMARKS=no .
   - make
   - make install
diff --git a/symengine_version.txt b/symengine_version.txt
new file mode 100644
index 0000000..7191ee4
--- /dev/null
+++ b/symengine_version.txt
@@ -0,0 +1 @@
+3f0c0947ae09bac9545334a6903d9d72c7043a52