diff --git a/dist/fastify.d.ts b/dist/fastify.d.ts
index 832e768..4038888 100644
--- a/dist/fastify.d.ts
+++ b/dist/fastify.d.ts
@@ -1,5 +1,5 @@
-export type ServiceResult = {
-    result: unknown;
+export type ServiceResult<T = unknown> = {
+    result: T;
     succesful: boolean;
 };
 //# sourceMappingURL=fastify.d.ts.map
\ No newline at end of file
diff --git a/dist/fastify.d.ts.map b/dist/fastify.d.ts.map
index 8d7771b..9f8556a 100644
--- a/dist/fastify.d.ts.map
+++ b/dist/fastify.d.ts.map
@@ -1 +1 @@
-{"version":3,"file":"fastify.d.ts","sourceRoot":"","sources":["../src/fastify.ts"],"names":[],"mappings":"AAAA,MAAM,MAAM,aAAa,GAAG;IAC1B,MAAM,EAAE,OAAO,CAAC;IAChB,SAAS,EAAE,OAAO,CAAC;CACpB,CAAC"}
\ No newline at end of file
+{"version":3,"file":"fastify.d.ts","sourceRoot":"","sources":["../src/fastify.ts"],"names":[],"mappings":"AAAA,MAAM,MAAM,aAAa,CAAC,CAAC,GAAG,OAAO,IAAI;IACvC,MAAM,EAAE,CAAC,CAAC;IACV,SAAS,EAAE,OAAO,CAAC;CACpB,CAAC"}
\ No newline at end of file
diff --git a/src/fastify.ts b/src/fastify.ts
index cc14938..0a042bd 100644
--- a/src/fastify.ts
+++ b/src/fastify.ts
@@ -1,4 +1,4 @@
-export type ServiceResult = {
-  result: unknown;
+export type ServiceResult<T = unknown> = {
+  result: T;
   succesful: boolean;
 };