diff --git a/README.md b/README.md
index 523605a..6715cdc 100644
--- a/README.md
+++ b/README.md
@@ -278,6 +278,11 @@ Example for an authorization configuration that is used for the system tests:
         "ca-certificate": "test-secrets/snakeoil-ca-1.crt"
     }
 
+Relative paths are interpreted with respect to the auth file, e.g. if the
+example above is stored in /some/dir/kt-auth.json, `kt` will expect to find the
+client certificate in /some/dir/test-secrets/kt-test.crt. You can disable this
+behavior by using absolute paths in the configuration file.
+
 ### TLS one-way
 
 Required fields: