diff --git a/AUTHORS.md b/AUTHORS.md
index fadd927..54563cf 100644
--- a/AUTHORS.md
+++ b/AUTHORS.md
@@ -11,7 +11,7 @@ individuals who have contributed code to this repository:
 * Jonas Klesy (jonas.klesy@googlemail.com)
 * Christof Jugel (christof.jugel@stud.tu-darmstadt.de)
 * Samuel Lokadjaja (samuel.lokadjaja@stud.tu-darmstadt.de)
-* Daniel Lorenz (lorenz@cs.tu-darmstadt.de
+* Daniel Lorenz (lorenz@cs.tu-darmstadt.de)
 * Benedikt Naumann (benedikt.naumann@gmx.de)
 * Jannis Neus (jannis.neus@stud.tu-darmstadt.de)
 * Nicolas Ollagnier (ncls_olg@yahoo.fr)
@@ -21,4 +21,5 @@ individuals who have contributed code to this repository:
 * Moritz Vanderheyden (moritz.vanderheyden@stud.tu-darmstadt.de)
 * Johannes Wehrstein (johannes.wehrstein@gmx.de)
 * Paul Wiedeking (p.wiedeking@grs-sim.de)
-* Luis Dreher (luis.dreher@stud.tu-darmstadt.de)
\ No newline at end of file
+* Luis Dreher (luis.dreher@stud.tu-darmstadt.de)
+* Jan André Reuter (j.reuter@fz-juelich.de)
diff --git a/extrap/util/string_formats.py b/extrap/util/string_formats.py
index 3d856c0..1f8e36c 100644
--- a/extrap/util/string_formats.py
+++ b/extrap/util/string_formats.py
@@ -9,6 +9,6 @@
 
 
 class FunctionFormats(enum.Enum):
-    NONE = None,
+    NONE = enum.auto()
     PYTHON = enum.auto()
     LATEX = enum.auto()