diff --git a/docs/installation.rst b/docs/installation.rst
index 30fece77b1b54..20d0c35b2aa97 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -15,6 +15,14 @@ You can also install Airflow with support for extra features like ``s3`` or ``po
 .. code-block:: bash
 
     pip install "apache-airflow[s3, postgres]"
+    
+.. note:: GPL dependency
+   
+    One of the dependencies of Apache Airflow by default pulls in a GPL library ('unidecode').
+    In case this is a concern you can force a non GPL library by issuing
+    ``export SLUGIFY_USES_TEXT_UNIDECODE=yes`` and then proceed with the normal installation.
+    Please note that this needs to be specified at every upgrade. Also note that if `unidecode`
+    is already present on the system the dependency will still be used.
 
 Extra Packages
 ''''''''''''''
@@ -107,4 +115,4 @@ After configuration, you'll need to initialize the database before you can run t
 
 .. code-block:: bash
 
-    airflow initdb
\ No newline at end of file
+    airflow initdb
diff --git a/setup.py b/setup.py
index 3822682cd632f..7279ed396e02c 100644
--- a/setup.py
+++ b/setup.py
@@ -240,7 +240,7 @@ def do_setup():
             'pygments>=2.0.1, <3.0',
             'python-daemon>=2.1.1, <2.2',
             'python-dateutil>=2.3, <3',
-            'python-nvd3==0.14.2',
+            'python-nvd3==0.15.0',
             'requests>=2.5.1, <3',
             'setproctitle>=1.1.8, <2',
             'sqlalchemy>=1.1.15, <1.2.0',