diff --git a/internal/handlers/app.go b/internal/handlers/app.go
index 2887139..2df2761 100644
--- a/internal/handlers/app.go
+++ b/internal/handlers/app.go
@@ -801,7 +801,7 @@ func (h *Handlers) HandleEnvVarDelete() http.HandlerFunc {
 		}
 
 		envVar, findErr := models.FindEnvVar(request.Context(), h.db, envVarID)
-		if findErr != nil || envVar == nil {
+		if findErr != nil || envVar == nil || envVar.AppID != appID {
 			http.NotFound(writer, request)
 
 			return
@@ -848,7 +848,7 @@ func (h *Handlers) HandleLabelDelete() http.HandlerFunc {
 		}
 
 		label, findErr := models.FindLabel(request.Context(), h.db, labelID)
-		if findErr != nil || label == nil {
+		if findErr != nil || label == nil || label.AppID != appID {
 			http.NotFound(writer, request)
 
 			return
@@ -926,7 +926,7 @@ func (h *Handlers) HandleVolumeDelete() http.HandlerFunc {
 		}
 
 		volume, findErr := models.FindVolume(request.Context(), h.db, volumeID)
-		if findErr != nil || volume == nil {
+		if findErr != nil || volume == nil || volume.AppID != appID {
 			http.NotFound(writer, request)
 
 			return
@@ -1016,7 +1016,7 @@ func (h *Handlers) HandlePortDelete() http.HandlerFunc {
 		}
 
 		port, findErr := models.FindPort(request.Context(), h.db, portID)
-		if findErr != nil || port == nil {
+		if findErr != nil || port == nil || port.AppID != appID {
 			http.NotFound(writer, request)
 
 			return