diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 9075151c..ffa1e6d7 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -31,6 +31,12 @@ repos:
         language: script
         files: '\.go$'
         pass_filenames: false
+      - id: go-vet
+        name: Go Vet
+        entry: bash -c 'cd backend && go vet ./...'
+        language: system
+        files: '\.go$'
+        pass_filenames: false
       - id: frontend-type-check
         name: Frontend TypeScript Check
         entry: bash -c 'cd frontend && npm run type-check'
diff --git a/backend/internal/services/uptime_service.go b/backend/internal/services/uptime_service.go
index 5e7ce08f..6e9e0a12 100644
--- a/backend/internal/services/uptime_service.go
+++ b/backend/internal/services/uptime_service.go
@@ -24,7 +24,7 @@ func NewUptimeService(db *gorm.DB, ns *NotificationService) *UptimeService {
 // CheckHost checks a single host and creates a notification if it's down
 func (s *UptimeService) CheckHost(host string, port int) bool {
 	timeout := 5 * time.Second
-	target := fmt.Sprintf("%s:%d", host, port)
+	target := net.JoinHostPort(host, fmt.Sprintf("%d", port))
 	conn, err := net.DialTimeout("tcp", target, timeout)
 	if err != nil {
 		return false
diff --git a/frontend/src/pages/Dashboard.tsx b/frontend/src/pages/Dashboard.tsx
index b77415e4..e9dc597f 100644
--- a/frontend/src/pages/Dashboard.tsx
+++ b/frontend/src/pages/Dashboard.tsx
@@ -14,7 +14,7 @@ export default function Dashboard() {
       try {
         const result = await checkHealth()
         setHealth(result)
-      } catch (err) {
+      } catch {
         setHealth({ status: 'error' })
       }
     }
diff --git a/frontend/src/pages/ImportCaddy.tsx b/frontend/src/pages/ImportCaddy.tsx
index b29a4d4d..b27e926f 100644
--- a/frontend/src/pages/ImportCaddy.tsx
+++ b/frontend/src/pages/ImportCaddy.tsx
@@ -17,7 +17,7 @@ export default function ImportCaddy() {
     try {
       await upload(content)
       setShowReview(true)
-    } catch (err) {
+    } catch {
       // Error is already set by hook
     }
   }
@@ -36,7 +36,7 @@ export default function ImportCaddy() {
       setContent('')
       setShowReview(false)
       alert('Import completed successfully!')
-    } catch (err) {
+    } catch {
       // Error is already set by hook
     }
   }
@@ -46,7 +46,7 @@ export default function ImportCaddy() {
       try {
         await cancel()
         setShowReview(false)
-      } catch (err) {
+      } catch {
         // Error is already set by hook
       }
     }