diff --git a/src/main/java/com/business/intelligence/service/controller/ProjectController.java b/src/main/java/com/business/intelligence/service/controller/ProjectController.java
index 08dbb17..d0886a7 100644
--- a/src/main/java/com/business/intelligence/service/controller/ProjectController.java
+++ b/src/main/java/com/business/intelligence/service/controller/ProjectController.java
@@ -12,7 +12,6 @@
 import java.util.Optional;
 
 import static org.springframework.http.MediaType.APPLICATION_JSON_VALUE;
-import static org.springframework.util.MimeTypeUtils.IMAGE_PNG_VALUE;
 
 @RestController
 @RequestMapping("/project")
@@ -24,21 +23,21 @@ public ProjectController(final ProjectRepository projectRepository) {
         this.projectRepository = projectRepository;
     }
 
-    @RequestMapping(value = "/{id}", method = RequestMethod.POST, produces = IMAGE_PNG_VALUE)
+    @RequestMapping(value = "/{id}", method = RequestMethod.POST, produces = APPLICATION_JSON_VALUE)
     public ResponseEntity<Project> create(@RequestHeader final HttpHeaders headers,
                                           @RequestBody final Project project) throws Exception {
         projectRepository.save(project);
         return ResponseEntity.ok().build();
     }
 
-    @RequestMapping(value = "/{id}", method = RequestMethod.GET, produces = IMAGE_PNG_VALUE)
+    @RequestMapping(value = "/{id}", method = RequestMethod.GET, produces = APPLICATION_JSON_VALUE)
     public ResponseEntity<Project> getById(@RequestHeader final HttpHeaders headers,
                                            @PathVariable("id") final int id) throws Exception {
         Optional<Project> result = projectRepository.findById(id);
         return result.map(ResponseEntity::ok).orElseGet(() -> ResponseEntity.notFound().build());
     }
 
-    @RequestMapping(value = "/all", method = RequestMethod.GET, produces = IMAGE_PNG_VALUE)
+    @RequestMapping(value = "/all", method = RequestMethod.GET, produces = APPLICATION_JSON_VALUE)
     public ResponseEntity<List<Project>> getAll(@RequestHeader final HttpHeaders headers) throws Exception {
         return ResponseEntity.ok(projectRepository.findAll());
     }
@@ -56,7 +55,7 @@ public ResponseEntity<Project> addStage(@PathVariable("id") final int id,
         return ResponseEntity.ok(result);
     }
 
-    @RequestMapping(value = "/{id}", method = RequestMethod.DELETE, produces = IMAGE_PNG_VALUE)
+    @RequestMapping(value = "/{id}", method = RequestMethod.DELETE, produces = APPLICATION_JSON_VALUE)
     public ResponseEntity<Void> delete(@RequestHeader final HttpHeaders headers,
                                        @PathVariable("id") final int id) throws Exception {
         Optional<Project> result = projectRepository.findById(id);
diff --git a/src/main/java/com/business/intelligence/service/controller/StageController.java b/src/main/java/com/business/intelligence/service/controller/StageController.java
index 3001f24..d3d793f 100644
--- a/src/main/java/com/business/intelligence/service/controller/StageController.java
+++ b/src/main/java/com/business/intelligence/service/controller/StageController.java
@@ -13,7 +13,6 @@
 import java.util.Optional;
 
 import static org.springframework.http.MediaType.APPLICATION_JSON_VALUE;
-import static org.springframework.util.MimeTypeUtils.IMAGE_PNG_VALUE;
 
 @RestController
 @RequestMapping("/stage")
@@ -25,7 +24,7 @@ public StageController(final StageRepository stageRepository) {
         this.stageRepository = stageRepository;
     }
 
-    @RequestMapping(value = "/{id}", method = RequestMethod.POST, produces = IMAGE_PNG_VALUE)
+    @RequestMapping(value = "/{id}", method = RequestMethod.POST, produces = APPLICATION_JSON_VALUE)
     public ResponseEntity<Stage> create(@RequestHeader final HttpHeaders headers,
                                         @RequestBody final Stage stage) throws Exception {
         stageRepository.save(stage);
@@ -33,14 +32,14 @@ public ResponseEntity<Stage> create(@RequestHeader final HttpHeaders headers,
         return ResponseEntity.ok().build();
     }
 
-    @RequestMapping(value = "/{id}", method = RequestMethod.GET, produces = IMAGE_PNG_VALUE)
+    @RequestMapping(value = "/{id}", method = RequestMethod.GET, produces = APPLICATION_JSON_VALUE)
     public ResponseEntity<Stage> getById(@RequestHeader final HttpHeaders headers,
                                          @PathVariable("id") final int id) throws Exception {
         Optional<Stage> result = stageRepository.findById(id);
         return result.map(ResponseEntity::ok).orElseGet(() -> ResponseEntity.notFound().build());
     }
 
-    @RequestMapping(value = "/all", method = RequestMethod.GET, produces = IMAGE_PNG_VALUE)
+    @RequestMapping(value = "/all", method = RequestMethod.GET, produces = APPLICATION_JSON_VALUE)
     public ResponseEntity<List<Stage>> getAll(@RequestHeader final HttpHeaders headers) throws Exception {
         return ResponseEntity.ok(stageRepository.findAll());
     }
diff --git a/src/main/java/com/business/intelligence/service/controller/TaskController.java b/src/main/java/com/business/intelligence/service/controller/TaskController.java
index 6707ed6..40aa6a2 100644
--- a/src/main/java/com/business/intelligence/service/controller/TaskController.java
+++ b/src/main/java/com/business/intelligence/service/controller/TaskController.java
@@ -15,7 +15,6 @@
 import java.util.Optional;
 
 import static org.springframework.http.MediaType.APPLICATION_JSON_VALUE;
-import static org.springframework.util.MimeTypeUtils.IMAGE_PNG_VALUE;
 
 @RestController
 @RequestMapping("/task")
@@ -27,20 +26,20 @@ public TaskController(final TaskRepository taskRepository) {
         this.taskRepository = taskRepository;
     }
 
-    @RequestMapping(value = "/{id}", method = RequestMethod.POST, produces = IMAGE_PNG_VALUE)
+    @RequestMapping(value = "/{id}", method = RequestMethod.POST, produces = APPLICATION_JSON_VALUE)
     public ResponseEntity<Task> create(@RequestHeader final HttpHeaders headers,
                                        @RequestBody final Task stage) throws Exception {
         return ResponseEntity.ok(taskRepository.save(stage));
     }
 
-    @RequestMapping(value = "/{id}", method = RequestMethod.GET, produces = IMAGE_PNG_VALUE)
+    @RequestMapping(value = "/{id}", method = RequestMethod.GET, produces = APPLICATION_JSON_VALUE)
     public ResponseEntity<Task> getById(@RequestHeader final HttpHeaders headers,
                                         @PathVariable("id") final int id) throws Exception {
         Optional<Task> result = taskRepository.findById(id);
         return result.map(ResponseEntity::ok).orElseGet(() -> ResponseEntity.notFound().build());
     }
 
-    @RequestMapping(value = "/all", method = RequestMethod.GET, produces = IMAGE_PNG_VALUE)
+    @RequestMapping(value = "/all", method = RequestMethod.GET, produces = APPLICATION_JSON_VALUE)
     public ResponseEntity<List<Task>> getAll(@RequestHeader final HttpHeaders headers) throws Exception {
         return ResponseEntity.ok(taskRepository.findAll());
     }