diff --git a/sdk-extensions/autoconfigure/src/main/java/io/opentelemetry/sdk/autoconfigure/ConfigProperties.java b/sdk-extensions/autoconfigure/src/main/java/io/opentelemetry/sdk/autoconfigure/ConfigProperties.java
index 0e3496b312..80e70239ed 100644
--- a/sdk-extensions/autoconfigure/src/main/java/io/opentelemetry/sdk/autoconfigure/ConfigProperties.java
+++ b/sdk-extensions/autoconfigure/src/main/java/io/opentelemetry/sdk/autoconfigure/ConfigProperties.java
@@ -24,7 +24,7 @@ import javax.annotation.Nullable;
  * for both of these will be normalized to be all lower case, and underscores will be replaced with
  * periods.
  */
-public class ConfigProperties {
+public final class ConfigProperties {
 
   private final Map<String, String> config;