diff --git a/README.md b/README.md
index f825544..7aef9fa 100644
--- a/README.md
+++ b/README.md
@@ -5,11 +5,16 @@ This package provides tools for the analysis of raw nanopore sequencing data, in
 Full documentation available at [Read the Docs](https://nanoraw.readthedocs.io)
 
 ## Installation
-Install nanoraw via pip
+Install nanoraw without plotting dependencies (base genome_resquiggle algorithm and text outputs: wig and fasta)
 ```
 pip install nanoraw
 ```
 
+Install nanoraw with plotting dependecies (requires separate installation of R packages ggplot2 and cowplot)
+```
+pip install nanoraw[plot]
+```
+
 Install bleeding edge via github
 ```
 pip install git+https://github.com/marcus1487/nanoraw.git
diff --git a/docs/conf.py b/docs/conf.py
index ad92a7e..eeaa670 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -55,9 +55,9 @@
 # built documents.
 #
 # The short X.Y version.
-version = u'0.4.1'
+version = u'0.4.2'
 # The full version, including alpha/beta/rc tags.
-release = u'0.4.1'
+release = u'0.4.2'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/nanoraw/nanoraw_helper.py b/nanoraw/nanoraw_helper.py
index 1b35673..17ddb05 100644
--- a/nanoraw/nanoraw_helper.py
+++ b/nanoraw/nanoraw_helper.py
@@ -8,7 +8,7 @@
 from itertools import izip
 from collections import defaultdict, namedtuple
 
-NANORAW_VERSION = '0.4.1'
+NANORAW_VERSION = '0.4.2'
 
 readData = namedtuple('readData', (
     'start', 'end', 'segs', 'read_start_rel_to_raw',
diff --git a/setup.py b/setup.py
index 5914999..8241936 100644
--- a/setup.py
+++ b/setup.py
@@ -6,9 +6,10 @@ def readme():
 
 setup(
     name = "nanoraw",
-    version = "0.4.1",
+    version = "0.4.2",
     packages = ["nanoraw"],
     install_requires = ['h5py', 'numpy', 'scipy'],
+    extras_require={'plot':['rpy2']},
 
     author = "Marcus Stoiber",
     author_email = "mhstoiber@lbl.gov",