diff --git a/src/index.ts b/src/index.ts
index d8d2633..9ab32a6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,5 +1,9 @@
 export * from './lib/config.module';
 export * from './lib/abstract/abstract-config.service';
 
+export * from './lib/abstract/abstract-config-source-provider';
+export * from './lib/provider/dotenv-source-provider';
+export * from './lib/provider/process-env-source-provider';
+
 export * from './lib/type-transformer';
 export * from './lib/config-scanner';