diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..db4ac51
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,6 @@
+
+default:
+	@echo "\"make upload\"?"
+
+upload: setup.py
+	python setup.py sdist upload --sign
diff --git a/README.md b/README.md
index 695cce1..5235a01 100644
--- a/README.md
+++ b/README.md
@@ -25,6 +25,13 @@ pyplot.show()
 ```
 
 ## Installation
+### Dependencies
+PseudoPy depends on numpy, scipy, matplotlib and shapely. If you are on Debian/Ubuntu, you can install these dependencies with
+```
+sudo apt-get install python-numpy python-scipy python-matplotlib python-shapely
+```
+
+### pip
 ```pip install pseudopy```
 
 Note that you may need to add `sudo` if you want to install it system-wide.
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..b69fb6a
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,4 @@
+matplotlib>=1.2
+numpy>=1.7
+scipy>=0.12
+shapely>=1.2
diff --git a/setup.py b/setup.py
index 8cef9e2..84a4ff4 100644
--- a/setup.py
+++ b/setup.py
@@ -9,15 +9,15 @@ def read(fname):
 
 setup(name='pseudopy',
       packages=['pseudopy'],
-      version='1.2.1',
+      version='1.2.4',
       description='Compute and visualize pseudospectra of'
                   + ' matrices (like eigtool)',
       long_description=read('README.md'),
       author='André Gaul',
       author_email='gaul@web-yard.de',
       url='https://github.com/andrenarchy/pseudopy',
-      requires=['matplotlib (>=1.2)', 'numpy (>=1.7)',
-                'scipy (>=0.12)', 'shapely (>=1.2)'],
+      install_requires=['matplotlib>=1.2', 'numpy>=1.7',
+                'scipy>=0.12', 'shapely>=1.2'],
       classifiers=[
           'Development Status :: 4 - Beta',
           'Intended Audience :: Science/Research',