diff --git a/.travis.yml b/.travis.yml
index 90de546d..c7730ed7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -21,6 +21,7 @@ addons:
     - gcc
     - liblapack-dev
     - libblas-dev
+    - wget
 
 env:
   - OPAMROOT=$HOME/.opam
diff --git a/README.md b/README.md
index 6bd5b6ee..bbb146be 100644
--- a/README.md
+++ b/README.md
@@ -14,7 +14,7 @@ A programming environment for wave function methods
 
 * Master: [![master build status](https://travis-ci.org/QuantumPackage/qp2.svg?branch=master)](https://travis-ci.org/QuantumPackage/qp2)
 * Development branch : [![dev build status](https://travis-ci.org/QuantumPackage/qp2.svg?branch=develop)](https://travis-ci.org/QuantumPackage/qp2)
-* Documentation [![Doc Status](https://quantum-package.readthedocs.io/en/latest/?badge=latest)
+* Documentation [![Doc Status](https://quantum-package.readthedocs.io/en/latest/?badge=master)
 
 
 # Credits
diff --git a/external/.gitignore b/external/.gitignore
new file mode 100644
index 00000000..241e560d
--- /dev/null
+++ b/external/.gitignore
@@ -0,0 +1,2 @@
+*
+