diff --git a/docs/index.rst b/docs/index.rst
index 71f94fe..7bf9e78 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -512,7 +512,7 @@ Then, navigate the to the `License Keys`_ page under your account, and create a
 
 .. warning::
 
-   The configuration file `format is different for older (i.e. <=3.1.1) and newer (i.e. >=3.1.1) versions
+   The configuration file format is different for older (i.e. <=3.1.1) and newer (i.e. >=3.1.1) versions
    of ``geoipupdate``. Be sure to select the correct version for your system.
 
 .. note::