diff --git a/cmd/server/main.go b/cmd/server/main.go
index a682e76..5ae0db9 100644
--- a/cmd/server/main.go
+++ b/cmd/server/main.go
@@ -15,6 +15,11 @@
 //	@host		localhost:8080
 //	@BasePath	/api
 //	@schemes	http https
+//
+//	@securityDefinitions.apikey	ApiKeyAuth
+//	@in				header
+//	@name			Authorization
+//	@description	JWT authentication using Bearer token. Format: Bearer <token>
 
 package main
 
diff --git a/pkg/greet/api_v1.go b/pkg/greet/api_v1.go
index 8ec441c..7a65f84 100644
--- a/pkg/greet/api_v1.go
+++ b/pkg/greet/api_v1.go
@@ -88,6 +88,7 @@ func (h *apiV1GreetHandler) RegisterRoutes(router chi.Router) {
 //	@Accept			json
 //	@Produce		json
 //	@Success		200	{object}	GreetResponse	"Successful response"
+//	@Security		ApiKeyAuth
 //	@Router			/v1/greet [get]
 func (h *apiV1GreetHandler) handleGreetQuery(w http.ResponseWriter, r *http.Request) {
 	name := r.URL.Query().Get("name")
@@ -104,6 +105,7 @@ func (h *apiV1GreetHandler) handleGreetQuery(w http.ResponseWriter, r *http.Requ
 //	@Param			name	path		string			true	"Name to greet"
 //	@Success		200		{object}	GreetResponse	"Successful response"
 //	@Failure		400		{object}	ErrorResponse	"Invalid name parameter"
+//	@Security		ApiKeyAuth
 //	@Router			/v1/greet/{name} [get]
 func (h *apiV1GreetHandler) handleGreetPath(w http.ResponseWriter, r *http.Request) {
 	name := chi.URLParam(r, "name")
diff --git a/pkg/greet/api_v2.go b/pkg/greet/api_v2.go
index 105d470..5378546 100644
--- a/pkg/greet/api_v2.go
+++ b/pkg/greet/api_v2.go
@@ -55,6 +55,7 @@ type greetResponse struct {
 //	@Param			request	body		GreetRequest	true	"Greeting request"
 //	@Success		200		{object}	GreetResponseV2	"Successful response"
 //	@Failure		400		{object}	ValidationError	"Validation error"
+//	@Security		ApiKeyAuth
 //	@Router			/v2/greet [post]
 func (h *apiV2GreetHandler) handleGreetPost(w http.ResponseWriter, r *http.Request) {
 	// Read request body