updated readme.md

replaced sxiv with nsxiv

 README.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 4e3db71..fac96bf 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 `fontpreview` is a commandline tool that lets you **quickly search** for fonts
 that are installed on your machine and preview them. The **fuzzy search** feature
 is provided by `fzf` and the preview is generated with `imagemagick` and then
-displayed using `sxiv`. This tool is **highly customizable**, almost all of the
+displayed using `nsxiv`. This tool is **highly customizable**, almost all of the
 variables in this tool can be changed using the commandline flags or you can
 configure them using environment variables.
 
@@ -14,7 +14,7 @@ configure them using environment variables.
 - `xdotool`
 - `fzf`
 - `imagemagick`
-- `sxiv`
+- `nsxiv`
 
 ## Installation
 ### Install using `make`