diff --git a/README.md b/README.md
index 128d8d5a..4f96886b 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 
 [![Build Status](https://travis-ci.org/DiamondLightSource/ispyb-api.svg?branch=master)](https://travis-ci.org/DiamondLightSource/ispyb-api)
 [![Coverage Status](https://coveralls.io/repos/github/DiamondLightSource/ispyb-api/badge.svg?branch=master)](https://coveralls.io/github/DiamondLightSource/ispyb-api?branch=master)
-[![Documentation Status](//readthedocs.org/projects/ispyb/badge/?version=latest)](https://ispyb.readthedocs.io/en/latest/?badge=latest)
+[![Documentation Status](https://readthedocs.org/projects/ispyb/badge/?version=latest)](https://ispyb.readthedocs.io/en/latest/?badge=latest)
 
 # ISPyB API