diff --git a/urlwatch/README.md b/urlwatch/README.md
index 5645c5a..4c4eea0 100644
--- a/urlwatch/README.md
+++ b/urlwatch/README.md
@@ -25,8 +25,8 @@ urlwatch:
 
 ## Makefile
 
-```Makefile
-SHELL = /bin/bash
+```
+SHELL = /bin/sh
 PATH := /usr/local/bin:$(PATH)
 
 SMTP = smtp.datageek.info:587
diff --git a/urlwatch/urlwatch/Makefile b/urlwatch/urlwatch/Makefile
index 60702a7..477d811 100644
--- a/urlwatch/urlwatch/Makefile
+++ b/urlwatch/urlwatch/Makefile
@@ -1,4 +1,4 @@
-SHELL = /bin/bash
+SHELL = /bin/sh
 PATH := /usr/local/bin:$(PATH)
 
 SMTP = smtp.datageek.info:587