diff --git a/spring-boot-modules/spring-boot-keycloak/README.md b/spring-boot-modules/spring-boot-keycloak/README.md
index 12b68d1da552..2e6eda83a5bf 100644
--- a/spring-boot-modules/spring-boot-keycloak/README.md
+++ b/spring-boot-modules/spring-boot-keycloak/README.md
@@ -247,7 +247,7 @@ The <em>AuthoritiesConverter</em> interface is a tip for the bean factory becaus
 As we configured Keycloak as an OpenID Provider by providing just its <em>issuer-uri</em>, what we get as input in the <em>GrantedAuthoritiesMapper</em> are <em>OidcUserAuthority</em> instances:
 <pre><code class="language-java">@Bean
 GrantedAuthoritiesMapper authenticationConverter(
-        Converter&lt;Map&lt;String, Object&gt;, Collection&lt;GrantedAuthority&gt;&gt; realmRolesAuthoritiesConverter) {
+        AuthoritiesConverter realmRolesAuthoritiesConverter) {
     return (authorities) -&gt; authorities.stream().filter(authority -&gt; authority instanceof OidcUserAuthority)
             .map(OidcUserAuthority.class::cast).map(OidcUserAuthority::getIdToken).map(OidcIdToken::getClaims)
             .map(realmRolesAuthoritiesConverter::convert)
diff --git a/spring-boot-modules/spring-boot-keycloak/spring-boot-resource-server/src/main/java/com/baeldung/boot/keycloak/resourceserver/SecurityConfig.java b/spring-boot-modules/spring-boot-keycloak/spring-boot-resource-server/src/main/java/com/baeldung/boot/keycloak/resourceserver/SecurityConfig.java
index bb8e75c64156..2e851f57e589 100644
--- a/spring-boot-modules/spring-boot-keycloak/spring-boot-resource-server/src/main/java/com/baeldung/boot/keycloak/resourceserver/SecurityConfig.java
+++ b/spring-boot-modules/spring-boot-keycloak/spring-boot-resource-server/src/main/java/com/baeldung/boot/keycloak/resourceserver/SecurityConfig.java
@@ -42,8 +42,7 @@ AuthoritiesConverter realmRolesAuthoritiesConverter() {
     }
 
     @Bean
-    JwtAuthenticationConverter authenticationConverter(
-            Converter<Map<String, Object>, Collection<GrantedAuthority>> authoritiesConverter) {
+    JwtAuthenticationConverter authenticationConverter(AuthoritiesConverter authoritiesConverter) {
         JwtAuthenticationConverter jwtAuthenticationConverter = new JwtAuthenticationConverter();
         jwtAuthenticationConverter
                 .setJwtGrantedAuthoritiesConverter(jwt -> authoritiesConverter.convert(jwt.getClaims()));