diff --git a/pygmt/datasets/earth_relief.py b/pygmt/datasets/earth_relief.py
index 1a949cc38f4..1dc288164ce 100644
--- a/pygmt/datasets/earth_relief.py
+++ b/pygmt/datasets/earth_relief.py
@@ -10,7 +10,7 @@
 from pygmt.src import grdcut, which
 
 
-@kwargs_to_strings(convert_bools=False, region="sequence")
+@kwargs_to_strings(region="sequence")
 def load_earth_relief(resolution="01d", region=None, registration=None, use_srtm=False):
     r"""
     Load Earth relief grids (topography and bathymetry) in various resolutions.