diff --git a/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigBuilder.java b/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigBuilder.java
index 4e18cb6258d..4046df9f2d4 100644
--- a/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigBuilder.java
+++ b/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigBuilder.java
@@ -73,6 +73,7 @@
 /**
  * Configuration builder.
  */
+@Deprecated
 public class MpConfigBuilder implements ConfigBuilder {
     private boolean useDefaultSources = false;
     private boolean useDiscoveredSources = false;
diff --git a/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigImpl.java b/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigImpl.java
index 64f4eea8f99..cc16e9ed52e 100644
--- a/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigImpl.java
+++ b/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigImpl.java
@@ -47,6 +47,7 @@
 /**
  * Implementation of the basic MicroProfile {@link org.eclipse.microprofile.config.Config} API.
  */
+@Deprecated
 public class MpConfigImpl implements Config {
     private static final Logger LOGGER = Logger.getLogger(MpConfigImpl.class.getName());
     // for references resolving
diff --git a/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigProviderResolver.java b/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigProviderResolver.java
index ef485b95bbc..34c3993156b 100644
--- a/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigProviderResolver.java
+++ b/config/config-mp/src/main/java/io/helidon/config/mp/MpConfigProviderResolver.java
@@ -225,6 +225,7 @@ public void releaseConfig(Config config) {
      * A delegate used to allow replacing configuration at runtime for components
      * that hold a reference to configuration obtained at build time.
      */
+    @Deprecated
     public static final class ConfigDelegate implements io.helidon.config.Config, Config {
         private final AtomicReference<Config> delegate = new AtomicReference<>();
         private final AtomicReference<io.helidon.config.Config> helidonDelegate = new AtomicReference<>();