diff --git a/README.md b/README.md
index ab8dc5b8..76638d6f 100644
--- a/README.md
+++ b/README.md
@@ -12,14 +12,14 @@ The official documentation for the operator is available at [https://bank-vaults
 
 ## Version compatibility matrix
 
-| Operator | Bank-Vaults CLI | Vault<sup>*</sup>                    |
+| Operator | Bank-Vaults CLI | Vault[^1]                            |
 |----------|-----------------|--------------------------------------|
 | 1.21.x   | >= 1.20.3       | 1.11.x<br>1.12.x<br>1.13.x<br>1.14.x |
 | 1.20.x   | >= 1.19.0       | 1.10.x<br>1.11.x<br>1.12.x<br>1.13.x |
 
 We provide patches and security fixes for the last two minor versions.
 
-<sup>*</sup> The versions listed here are those with which the operator was tested. Newer versions may also be compatible.
+[^1]: The versions listed here are those with which the operator was tested. Newer versions may also be compatible.
 
 ## Development