diff --git a/Makefile b/Makefile
index b9d242b..88d6e38 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,7 @@
 .ONESHELL:
 .PHONY: build
 
+# this is run to generate the files for github release
 all:
 	cd ./src/
 	latexmk -pdf -xelatex -interaction=nonstopmode cv.tex
@@ -8,6 +9,7 @@ all:
 	convert ./src/cv.pdf[0] -resize 800x800 -flatten cv_thumbnail.png
 	convert cv_thumbnail.png -shave 1x1 -bordercolor black -border 1 cv_thumbnail.png
 	convert cv_thumbnail.png -bordercolor None -border 20x20 \( +clone -background black -shadow 50x5+5+5 \) -compose DstOver -composite -compose Over cv_thumbnail.png
+	optipng cv_thumbnail.png
 
 build:
 	cd ./src/