diff --git a/README.md b/README.md
index 9eaf726..2684a4f 100644
--- a/README.md
+++ b/README.md
@@ -255,7 +255,7 @@ that is:
 Since `L` and `R` can be any left or right parenthesis, and every matrices must have the same number of columns, to render a system of equation one can write something like `{[(root n x)/(x) <= 4], [x^2=e^x]:}`.  
 On the other hand a matrix can be somenthing like `[[(root n x)/(x) <= 4, int x dx], [x^2=e^x, lim_(x to infty) 1 / (x^2)]]`.
 
-## Rendering (LaTeX semantics)
+## Rendering (LaTeX)
 
 A parsed ASCIIMath string is rendered as follows:
 
@@ -277,7 +277,7 @@ Useless delimiters are automatically removed in expressions like:
   
 If you want them to be rendered, you have to double them, for example: `((x+y))/2` or `{: (x+y) :}/2`.
 
-## Rendering (MathML semantics)
+## Rendering (MathML)
 
 The translation follows the MathML specification at https://www.w3.org/TR/MathML3/.
 
diff --git a/py_asciimath/__init__.py b/py_asciimath/__init__.py
index 2be5cbc..2004cc7 100644
--- a/py_asciimath/__init__.py
+++ b/py_asciimath/__init__.py
@@ -1,4 +1,4 @@
 import os
 
 PROJECT_ROOT = os.path.abspath(os.path.dirname(__file__))
-__version__ = "0.2.2"
+__version__ = "0.2.3"
diff --git a/py_asciimath/translator/translator.py b/py_asciimath/translator/translator.py
index 92bb247..236702c 100644
--- a/py_asciimath/translator/translator.py
+++ b/py_asciimath/translator/translator.py
@@ -14,6 +14,13 @@
 
 
 class Translator(metaclass=ABCMeta):
+    """Abstract Translator class
+
+    Abstract class of type Translator. Every subclass must implement
+    the `_translate(self, exp, **kwargs)` method in order to
+    correctly expose the `translate(exp, **kwargs)` method
+    """
+
     def _from_file(self, from_file):
         if os.path.exists(from_file):
             logging.info("Loading file '" + from_file + "'...")
diff --git a/setup.py b/setup.py
index d9a5c90..1dbbf49 100644
--- a/setup.py
+++ b/setup.py
@@ -28,7 +28,6 @@
     classifiers=[
         "License :: OSI Approved :: MIT License",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",