diff --git a/Makefile b/Makefile
index 0d6c086..a0ad852 100644
--- a/Makefile
+++ b/Makefile
@@ -2,6 +2,9 @@
 
 HTMLS = $(patsubst %.ipynb,html/%.html,$(wildcard *.ipynb))
 
+badmathjax = "file:\/\/\/usr\/share\/javascript\/mathjax\/MathJax.js?config=TeX-AMS_CHTML-full,Safe"
+goodmathjax = "https:\/\/cdn.jsdelivr.net\/npm\/mathjax@2\/MathJax.js?config=TeX-AMS_CHTML"
+
 all: $(HTMLS)
 
 clean:
@@ -9,6 +12,7 @@ clean:
 
 html/%.html: %.ipynb | html
 	jupyter nbconvert --to html $< --output $@ --execute
+	sed -i 's/$(badmathjax)/$(goodmathjax)/' $@
 
 html:
 	mkdir -p html