diff --git a/.readthedocs.yml b/.readthedocs.yml
index 25271d9..1e8ec15 100644
--- a/.readthedocs.yml
+++ b/.readthedocs.yml
@@ -22,7 +22,7 @@ build:
         post_install:
             # Install dependencies with 'docs' dependency group
             # https://python-poetry.org/docs/managing-dependencies/#dependency-groups
-            - poetry install --with docs
+            - VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH poetry install --with docs
 
 # Build documentation in the "docs/" directory with Sphinx
 sphinx:
diff --git a/docs/index.rst b/docs/index.rst
index 51be79b..db7e478 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -13,7 +13,8 @@ Safe bindings to `resvg <https://github.com/RazrFalcon/resvg>`_
    :caption: Contents:
 
    installation
-   usgae
+   usage
+   resvg
    contributing
 
 Indices and tables
diff --git a/docs/resvg.rst b/docs/resvg.rst
index fd422e9..bb8d825 100644
--- a/docs/resvg.rst
+++ b/docs/resvg.rst
@@ -1,7 +1,50 @@
 Resvg Module
 ============
 
-.. currentmodule:: resvg_py.svg_to_base64
+.. py:function:: svg_to_base64(svg_string:str,width:int|None=None,height:int|None=None,zoom:int|None=None,dpi:int|None=None,resources_dir:width:str|None=None,languages:list[str]|None=None,font_size:float|None=None,font_family:str|None=None,serif_family:str|None=None,sans_serif_family:str|None=None,cursive_family:str|None=None,fantasy_family:str|None=None,monospace_family:str|None=None,font_files:list[str]|None=None,font_dirs:list[str]|None=None,shape_rendering:"optimize_speed"|"crisp_edges"|"geometric_precision"="geometric_precision",text_rendering:"optimize_speed"|"optimize_legibility"|"geometric_precision"="optimize_legibility",image_rendering:"optimize_quality"|"optimize_speed"="optimize_quality",background:str|None=None) -> str
 
+    :param svg_string: A string containing valid svg.
+    :type svg_string: string
 
-.. function 
\ No newline at end of file
+    :param width: An Integer containing the pixels size for width.
+    :type width: int or None
+
+    :param height: An Integer containing the pixels size for height.
+    :type height: int or None
+
+    :param zoom: An Integer containing the zoom percentage.
+    :type zoom: int or None
+    
+    :param dpi: An Integer containing DPI size for the svg rendering.
+    :type dpi: int or None
+
+    :param resources_dir: A directory that contains resources for svg rendering. Such as `foreign objects <https://developer.mozilla.org/en-US/docs/Web/SVG/Element/foreignObject>`_.
+    :type resources_dir: string or None
+
+    :param languages: A list of string containing the languages used for `svg` rendering
+    :type languages: list[str] or None
+
+    :param font_size: An integer describing the font_size.
+    :param font_family: A string that describes the font family used in SVG.
+    :param serif_family: A string that describes the serif font family used in SVG.
+    :param sans_serif_family: A string that describes the sans serif font family used in SVG.
+    :param cursive_family: A string that describes the cursive font family used in SVG.
+    :param fantasy_family: A string that describes the fantasy font family used in SVG.
+    :param monospace_family: A string that describes the monospace font family used in SVG.
+ 
+    :param font_files: A list of paths that contain the font file.
+    :param font_dirs: A list of directories that contain the font file. This parameter will add all the present files in the directory.
+     
+    :param shape_rendering: The `shape rendering method <https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/shape-rendering>`_ used in resvg. **Defaults to "geometric_precision"**.
+    :type shape_rendering: "optimize_speed" or "crisp_edges" or **"geometric_precision"**
+
+    :param text_rendering: The `text rendering method <https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/text-rendering>`_ used in resvg. **Defaults to "optimize_legibility"**.
+    :type text_rendering: "optimize_speed" or **"optimize_legibility"** or "geometric_precision"
+
+    :param image_rendering: The `image rendering method <https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/image-rendering>`_ used in resvg. **Defaults to "optimize_quality"**.
+    :type image_rendering: **"optimize_quality"** or "optimize_speed"
+
+
+
+    :return: base64 encoded string.
+    :rtype: str
\ No newline at end of file
diff --git a/src/rust/lib.rs b/src/rust/lib.rs
index 83cae9f..9d5e851 100644
--- a/src/rust/lib.rs
+++ b/src/rust/lib.rs
@@ -188,7 +188,7 @@ fn svg_to_base64(
     };
 
     let _text_rendering = match text_rendering
-        .unwrap_or("geometric_precision".to_string())
+        .unwrap_or("optimize_legibility".to_string())
         .as_ref()
     {
         "optimize_speed" => resvg::usvg::TextRendering::OptimizeSpeed,