diff --git a/README.md b/README.md
index e71cd4e..a7d01ff 100644
--- a/README.md
+++ b/README.md
@@ -10,9 +10,12 @@ can be visualised.
 
 ## Installation
 
+Please install python header files of your Python version. 
+Those are needed to compile the pycocotools with Cython upon installation.
+
 ```sh
 pip install twomartens.masterthesis
-pip install git+https://github.com/philferriere/cocoapi.git#egg=pycocotools&subdirectory=PythonAPI
+pip install 'git+https://github.com/philferriere/cocoapi.git#egg=pycocotools&subdirectory=PythonAPI'
 ```
 
 The second line is important as Git dependencies cannot be specified in the `setup.py`
@@ -79,11 +82,13 @@ the repository:
 git submodule init
 git submodule update
 pip install -e .
-pip install git+https://github.com/philferriere/cocoapi.git#egg=pycocotools&subdirectory=PythonAPI
+pip install 'git+https://github.com/philferriere/cocoapi.git#egg=pycocotools&subdirectory=PythonAPI'
 ```
 
 ## Release History
 
+* 0.3.0
+    * added cython dependency and information about required python header files
 * 0.2.0
     * added python 3.8 classifier
 * 0.1.0
diff --git a/setup.py b/setup.py
index d6e9cc2..b6bbc89 100644
--- a/setup.py
+++ b/setup.py
@@ -29,7 +29,7 @@ setup(
     author="Jim Martens",
     author_email="github@2martens.de",
     url="https://git.2martens.de/2martens/masterthesis",
-    version="0.1.0",
+    version="0.3.0",
     namespace_packages=["twomartens"],
     packages=find_packages('src', exclude=["*.tests", "*.tests.*", "tests.*", "tests"]),
     package_dir={'': 'src'},
@@ -39,7 +39,7 @@ setup(
     },
     python_requires="~=3.6",
     install_requires=["tensorflow", "Pillow", "h5py", "numpy", "opencv-python", "scikit-learn", "tqdm",
-                      "beautifulsoup4", "matplotlib", "protobuf", "imutils", "attributedict"],
+                      "beautifulsoup4", "matplotlib", "protobuf", "imutils", "attributedict", "cython"],
     license="Apache License 2.0",
     classifiers=[
         "Operating System :: OS Independent",