diff --git a/doc/conf.py b/doc/conf.py
index 12f326f9e0f..fb47eab1d19 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -117,7 +117,7 @@
 # General information about the project
 year = datetime.date.today().year
 project = "PyGMT"
-copyright = f"2017-{year}, The PyGMT Developers."  # pylint: disable=redefined-builtin
+copyright = f"2017-{year}, The PyGMT Developers"  # pylint: disable=redefined-builtin
 if len(__version__.split("+")) > 1 or __version__ == "unknown":
     version = "dev"
 else: