diff --git a/README.md b/README.md
index a84d702..8c5a1d4 100644
--- a/README.md
+++ b/README.md
@@ -24,12 +24,12 @@ will produce `loyalty_degauss_daymet_0.1.0.csv` with added columns:
 ### Optional Argument
 
 - Optional arguments include:
-**'vars'**: daymet variables (any of: <tmax, tmin, srad, vp, swe, prcp, dayl> separated by comma)
-**'min_lon'**: minimum longitude (numeric)
-**'max_lon'**: maximum longitude (numeric)
-**'min_lat'**: minimum_latitude (numeric)
-**'max_lat'**: maximum latitude (numeric)
-**'region'**: daymet region ('na' for North America, 'hi' for Hawaii, 'pr' for Puerto Rico)
+- **'vars'**: daymet variables (any of: <tmax, tmin, srad, vp, swe, prcp, dayl> separated by comma)
+- **'min_lon'**: minimum longitude (numeric)
+- **'max_lon'**: maximum longitude (numeric)
+- **'min_lat'**: minimum_latitude (numeric)
+- **'max_lat'**: maximum latitude (numeric)
+- **'region'**: daymet region ('na' for North America, 'hi' for Hawaii, 'pr' for Puerto Rico)
 
 ## Geomarker Methods