diff --git a/.github/workflows/go.yml b/.github/workflows/go.yml
index 6f1b82f..477488e 100644
--- a/.github/workflows/go.yml
+++ b/.github/workflows/go.yml
@@ -13,7 +13,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: "1.23.x"
+          go-version: "1.25.x"
       - name: Build
         run: go build -v ./...
       - name: Test
@@ -25,9 +25,8 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-go@v5
         with:
-          go-version: "1.23.x"
+          go-version: "1.25.x"
       - name: golangci-lint
-        uses: golangci/golangci-lint-action@v6
+        uses: golangci/golangci-lint-action@v8
         with:
           version: latest
-
diff --git a/go.mod b/go.mod
index ef525d1..36ff52f 100644
--- a/go.mod
+++ b/go.mod
@@ -1,8 +1,6 @@
 module github.com/samshadwell/split-ynab
 
-go 1.23.1
-
-toolchain go1.24.1
+go 1.25.1
 
 require (
 	github.com/aws/aws-cdk-go/awscdk/v2 v2.218.0
diff --git a/internal/storage/file_storage_adapter.go b/internal/storage/file_storage_adapter.go
index 1067c05..097dd70 100644
--- a/internal/storage/file_storage_adapter.go
+++ b/internal/storage/file_storage_adapter.go
@@ -39,7 +39,7 @@ func (l *localStorageAdapter) GetLastServerKnowledge(ctx context.Context, budget
 	return 0, fmt.Errorf("no budget found with id %v", budgetId)
 }
 
-func (l *localStorageAdapter) SetLastServerKnowledge(ctx context.Context, budgetId uuid.UUID, serverKnowledge int64) error {
+func (l *localStorageAdapter) SetLastServerKnowledge(ctx context.Context, budgetId uuid.UUID, serverKnowledge int64) (err error) {
 	var data []budgetData
 
 	if _, err := os.Stat(storageFile); err == nil {
@@ -68,25 +68,39 @@ func (l *localStorageAdapter) SetLastServerKnowledge(ctx context.Context, budget
 	if err != nil {
 		return err
 	}
-	defer f.Close()
+	defer func() {
+		if closeErr := f.Close(); err == nil && closeErr != nil {
+			err = fmt.Errorf("failed to close storage file: %w", closeErr)
+		}
+	}()
 
 	encoder := yaml.NewEncoder(f)
-	defer encoder.Close()
+	defer func() {
+		if closeErr := encoder.Close(); err == nil && closeErr != nil {
+			err = fmt.Errorf("failed to close YAML encoder: %w", closeErr)
+		}
+	}()
+
+	if err = encoder.Encode(data); err != nil {
+		return fmt.Errorf("failed to encode storage data: %w", err)
+	}
 
-	return encoder.Encode(data)
+	return nil
 }
 
-func (l *localStorageAdapter) readData() ([]budgetData, error) {
+func (l *localStorageAdapter) readData() (data []budgetData, err error) {
 	f, err := os.Open(storageFile)
 	if err != nil {
 		return nil, err
 	}
-	defer f.Close()
+	defer func() {
+		if closeErr := f.Close(); err == nil && closeErr != nil {
+			err = fmt.Errorf("failed to close storage file: %w", closeErr)
+		}
+	}()
 
-	var data []budgetData
 	decoder := yaml.NewDecoder(f)
-	err = decoder.Decode(&data)
-	if err != nil {
+	if err = decoder.Decode(&data); err != nil {
 		return nil, err
 	}