diff --git a/plotid/plotoptions.py b/plotid/plotoptions.py
index 521e4845cfbf8fa0de8fbd83bdcd380ca6a08954..3a60c6db3b0bda2beadb52a4bc066fd4f01b0189 100644
--- a/plotid/plotoptions.py
+++ b/plotid/plotoptions.py
@@ -50,10 +50,9 @@ class PlotOptions:
     id_method : str, optional
         id_method for creating the ID. Create an ID by Unix time is referenced
         as "time", create a random ID with id_method="random".
-        The default is 'time'.
+        The default is "time".
     qrcode : bool, optional
-        Experimental support to encode the ID in a QR code on the exported plot.
-        Default: False.
+        Encode the ID in a QR code on the exported plot. Default: False.
     qr_position : tuple, optional
         Position of the bottom right corner of the QR Code on the plot in relative
         (x, y) coordinates. Default: (1, 0).
@@ -63,7 +62,9 @@ class PlotOptions:
         Print ID on the plot. Default: True.
     font: str, optional
         Font that will be used to print the ID. A path to an .otf or a .ttf
-        file has to be given.
+        file has to be given. To use already installed fonts, you can search for the
+        standard path of fonts on your operating system and give then the path of the
+        desired font file to this parameter.
     fontsize: int, optional
         Fontsize for the displayed ID. Default: 12.
     fontcolor: tuple, optional
diff --git a/plotid/resources/OpenSans/OFL.txt b/plotid/resources/OpenSans/OFL.txt
new file mode 100644
index 0000000000000000000000000000000000000000..9b448d4017f9233c21ae6db92c90bc2d229f56b2
--- /dev/null
+++ b/plotid/resources/OpenSans/OFL.txt
@@ -0,0 +1,93 @@
+Copyright 2020 The Open Sans Project Authors (https://github.com/googlefonts/opensans)
+
+This Font Software is licensed under the SIL Open Font License, Version 1.1.
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+
+-----------------------------------------------------------
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+-----------------------------------------------------------
+
+PREAMBLE
+The goals of the Open Font License (OFL) are to stimulate worldwide
+development of collaborative font projects, to support the font creation
+efforts of academic and linguistic communities, and to provide a free and
+open framework in which fonts may be shared and improved in partnership
+with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves. The
+fonts, including any derivative works, can be bundled, embedded, 
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works. The fonts and derivatives,
+however, cannot be released under any other type of license. The
+requirement for fonts to remain under this license does not apply
+to any document created using the fonts or their derivatives.
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such. This may
+include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components as
+distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting -- in part or in whole -- any of the components of the
+Original Version, by changing formats or by porting the Font Software to a
+new environment.
+
+"Author" refers to any designer, engineer, programmer, technical
+writer or other person who contributed to the Font Software.
+
+PERMISSION & CONDITIONS
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,
+in Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+redistributed and/or sold with any software, provided that each copy
+contains the above copyright notice and this license. These can be
+included either as stand-alone text files, human-readable headers or
+in the appropriate machine-readable metadata fields within text or
+binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+Name(s) unless explicit written permission is granted by the corresponding
+Copyright Holder. This restriction only applies to the primary font name as
+presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+Software shall not be used to promote, endorse or advertise any
+Modified Version, except to acknowledge the contribution(s) of the
+Copyright Holder(s) and the Author(s) or with their explicit written
+permission.
+
+5) The Font Software, modified or unmodified, in part or in whole,
+must be distributed entirely under this license, and must not be
+distributed under any other license. The requirement for fonts to
+remain under this license does not apply to any document created
+using the Font Software.
+
+TERMINATION
+This license becomes null and void if any of the above conditions are
+not met.
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT. IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM
+OTHER DEALINGS IN THE FONT SOFTWARE.
diff --git a/plotid/resources/OpenSans/OpenSans-Bold.ttf b/plotid/resources/OpenSans/OpenSans-Bold.ttf
new file mode 100644
index 0000000000000000000000000000000000000000..a1398b338084cbaf0e99d89cb6089715baa78a6d
Binary files /dev/null and b/plotid/resources/OpenSans/OpenSans-Bold.ttf differ
diff --git a/plotid/resources/OpenSans/OpenSans-Regular.ttf b/plotid/resources/OpenSans/OpenSans-Regular.ttf
new file mode 100644
index 0000000000000000000000000000000000000000..1dc226ddc00a11a9813844b00fb5edaf87921c38
Binary files /dev/null and b/plotid/resources/OpenSans/OpenSans-Regular.ttf differ
diff --git a/plotid/resources/__init__.py b/plotid/resources/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/plotid/tagplot.py b/plotid/tagplot.py
index 6a407a70e8e555329be929810406c6184a3cf16e..b43b3a36bef27e7327e5d3146d015b30546d6287 100644
--- a/plotid/tagplot.py
+++ b/plotid/tagplot.py
@@ -56,10 +56,9 @@ def tagplot(
     id_method : str, optional
         id_method for creating the ID. Create an ID by Unix time is referenced
         as "time", create a random ID with id_method="random".
-        The default is 'time'.
+        The default is "time".
     qrcode : bool, optional
-         Experimental support to encode the ID in a QR code on the exported plot.
-         Default: False.
+         Encode the ID in a QR code on the exported plot. Default: False.
     qr_position : tuple, optional
         Position of the bottom right corner of the QR Code on the plot in relative
         (x, y) coordinates. Default: (1, 0).
@@ -68,8 +67,10 @@ def tagplot(
     id_on_plot: bool, optional
          Print ID on the plot. Default: True.
     font: str, optional
-        Font that will be used to print the ID. A path to an .otf or a .ttf
-        file has to be given.
+        Font that will be used to print the ID. An absolute path to an .otf or a .ttf
+        file has to be given. To use already installed fonts, you can search for the
+        standard path of fonts on your operating system and give then the path of the
+        desired font file to this parameter.
     fontsize: int, optional
         Fontsize for the displayed ID. Default: 12.
     fontcolor: tuple, optional
diff --git a/plotid/tagplot_image.py b/plotid/tagplot_image.py
index 888fec1944f2811d32e08cb8250c2f5f6a97d5ff..a1f60eb7c86c2af040dbd3563cd882ecd01360fb 100644
--- a/plotid/tagplot_image.py
+++ b/plotid/tagplot_image.py
@@ -7,6 +7,7 @@ Functions:
 """
 import os
 import warnings
+from importlib.resources import files
 from PIL import Image, ImageDraw, ImageFont, ImageOps
 from plotid.create_id import create_id, create_qrcode
 from plotid.plotoptions import PlotOptions, PlotIDTransfer
@@ -38,11 +39,22 @@ def tagplot_image(plotid_object: PlotOptions) -> PlotIDTransfer:
         if not isinstance(img, str):
             raise TypeError("Name of the image is not a string.")
         if not os.path.isfile(img):
-            raise TypeError("File does not exist.")
+            raise TypeError(f"Image '{img}' does not exist.")
             # Check if figs is a valid file is done by pillow internally
 
     color = tuple(rgb_value * 255 for rgb_value in plotid_object.fontcolor)
-    font = ImageFont.load_default()
+    # font = ImageFont.load_default()
+    font_path = (
+        files("plotid.resources").joinpath("OpenSans").joinpath("OpenSans-Regular.ttf")
+    )
+    font = ImageFont.truetype(str(font_path), plotid_object.fontsize)
+
+    if plotid_object.font:
+        try:
+            # Absolute path to font file (.ttf or .otf) has to be given
+            font = ImageFont.truetype(plotid_object.font, plotid_object.fontsize)
+        except OSError:
+            warnings.warn("Font was not found.\nplotID continues with fallback font.")
 
     if plotid_object.font:
         try:
diff --git a/plotid/tagplot_matplotlib.py b/plotid/tagplot_matplotlib.py
index f0eaac2910a7eb68f6b5fdafbe21238ec99eebd8..2a0b44145537be999324662fac3b0b8d7232c710 100644
--- a/plotid/tagplot_matplotlib.py
+++ b/plotid/tagplot_matplotlib.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 """Tag your matplotlib plot with an ID."""
 
+from importlib.resources import files
 import matplotlib
 import matplotlib.pyplot as plt
 from PIL import Image
@@ -35,6 +36,19 @@ def tagplot_matplotlib(plotid_object: PlotOptions) -> PlotIDTransfer:
         if not isinstance(figure, matplotlib.figure.Figure):
             raise TypeError("Figure is not a valid matplotlib-figure.")
 
+    if plotid_object.font:
+        # Load custom font into matplotlib
+        matplotlib.font_manager.fontManager.addfont(plotid_object.font)
+        font = matplotlib.font_manager.FontProperties(fname=plotid_object.font)
+    else:
+        font = (
+            files("plotid.resources")
+            .joinpath("OpenSans")
+            .joinpath("OpenSans-Regular.ttf")
+        )
+        matplotlib.font_manager.fontManager.addfont(str(font))
+        font = matplotlib.font_manager.FontProperties(fname=font)
+
     # Loop to create and position the IDs
     for j, fig in enumerate(plotid_object.figs):
         if plotid_object.id_method == "custom":
@@ -48,11 +62,6 @@ def tagplot_matplotlib(plotid_object: PlotOptions) -> PlotIDTransfer:
         plt.figure(fig)
 
         if plotid_object.id_on_plot:
-            font = "DejaVu Sans"
-            if plotid_object.font:
-                # Load custom font into matplotlib
-                matplotlib.font_manager.fontManager.addfont(plotid_object.font)
-                font = matplotlib.font_manager.FontProperties(fname=plotid_object.font)
 
             plt.figtext(
                 x=plotid_object.position[0],
diff --git a/tests/test_tagplot_image.py b/tests/test_tagplot_image.py
index 6ffbca0e0cf36e87f087bb02a32295d2c008a5a6..2dd88fc35cee0f5d3907dabfd0947771ff90b617 100644
--- a/tests/test_tagplot_image.py
+++ b/tests/test_tagplot_image.py
@@ -47,7 +47,7 @@ class TestTagplotImage(unittest.TestCase):
             id_method=METHOD,
             qrcode=True,
             fontsize=10,
-            font="tests/fonts/xolonium-fonts-4.1/ttf/Xolonium-Bold.ttf",
+            font="plotid/resources/OpenSans/OpenSans-Bold.ttf",
             fontcolor=(0, 1, 0),
         )
         options.validate_input()
@@ -88,20 +88,9 @@ class TestTagplotImage(unittest.TestCase):
         with self.assertRaises(TypeError):
             tagplot_image("wrong_object")
 
-    def test_wrong_font(self) -> None:
-        """Test if Warning is raised if a given font file can not be found."""
-        options = PlotOptions(
-            [IMG1, IMG2],
-            ROTATION,
-            POSITION,
-            figure_ids=["test123456", "654321tset"],
-            prefix=PROJECT_ID,
-            id_method=METHOD,
-            qrcode=True,
-            fontsize=10,
-            font="not_existing_font.ttf",
-            fontcolor=(0, 1, 0),
-        )
+    def test_font_file_not_defined(self) -> None:
+        """Test if a Warning is raised if an invalid font file was specified."""
+        options = PlotOptions(IMG1, ROTATION, POSITION, font="font")
         options.validate_input()
         with self.assertWarns(Warning):
             tagplot_image(options)
diff --git a/tests/test_tagplot_matplotlib.py b/tests/test_tagplot_matplotlib.py
index 6ce909f969a4719a3d708e1d6089d6548d76caae..d93e768610983d0dcabe6deaa913973e8516a8dd 100644
--- a/tests/test_tagplot_matplotlib.py
+++ b/tests/test_tagplot_matplotlib.py
@@ -38,7 +38,7 @@ class TestTagplotMatplotlib(unittest.TestCase):
             id_method=METHOD,
             qrcode=True,
             fontsize=10,
-            font="tests/fonts/xolonium-fonts-4.1/otf/Xolonium-Regular.otf",
+            font="plotid/resources/OpenSans/OpenSans-Bold.ttf",
             fontcolor=(0, 0, 1),
         )
         options.validate_input()