diff --git a/docs/resources/connection.md b/docs/resources/connection.md
index 902d7f378..a5c46b0eb 100644
--- a/docs/resources/connection.md
+++ b/docs/resources/connection.md
@@ -768,7 +768,7 @@ Optional:
 
 Required:
 
-- `pkce` (String) PKCE configuration. Possible values: `auto` (uses the strongest algorithm available), `s256` (uses the SHA-256 algorithm), `plain` (uses plaintext as described in the PKCE specification) or `disabled` (disables support for PKCE).
+- `pkce` (String) PKCE configuration. Possible values: `auto` (uses the strongest algorithm available), `S256` (uses the SHA-256 algorithm), `plain` (uses plaintext as described in the PKCE specification) or `disabled` (disables support for PKCE).
 
 
 <a id="nestedblock--options--decryption_key"></a>
diff --git a/internal/auth0/connection/schema.go b/internal/auth0/connection/schema.go
index 0dc4bda82..7ac4ecbed 100644
--- a/internal/auth0/connection/schema.go
+++ b/internal/auth0/connection/schema.go
@@ -802,9 +802,9 @@ var optionsSchema = &schema.Schema{
 						"pkce": {
 							Type:         schema.TypeString,
 							Required:     true,
-							ValidateFunc: validation.StringInSlice([]string{"auto", "s256", "plain", "disabled"}, false),
+							ValidateFunc: validation.StringInSlice([]string{"auto", "S256", "plain", "disabled"}, false),
 							Description: "PKCE configuration. Possible values: `auto` (uses the strongest algorithm available), " +
-								"`s256` (uses the SHA-256 algorithm), `plain` (uses plaintext as described in the PKCE specification) " +
+								"`S256` (uses the SHA-256 algorithm), `plain` (uses plaintext as described in the PKCE specification) " +
 								"or `disabled` (disables support for PKCE).",
 						},
 					},