diff --git a/pkg/api/server.go b/pkg/api/server.go
index 65454f704..3bc005eeb 100644
--- a/pkg/api/server.go
+++ b/pkg/api/server.go
@@ -119,7 +119,7 @@ func Start() {
 			return
 		}
 
-		_ = os.Mkdir(downloads, 0755)
+		_ = os.Mkdir(downloads, 0644)
 
 		config.Set(config.Stash, stash)
 		config.Set(config.Generated, generated)
diff --git a/pkg/manager/generator_sprite.go b/pkg/manager/generator_sprite.go
index 07805c61f..eb0d943b3 100644
--- a/pkg/manager/generator_sprite.go
+++ b/pkg/manager/generator_sprite.go
@@ -60,6 +60,9 @@ func (g *SpriteGenerator) Generate() error {
 }
 
 func (g *SpriteGenerator) generateSpriteImage(encoder *ffmpeg.Encoder) error {
+	if g.imageExists() {
+		return nil
+	}
 	logger.Infof("[generator] generating sprite image for %s", g.Info.VideoFile.Path)
 
 	// Create `this.chunkCount` thumbnails in the tmp directory
@@ -109,6 +112,9 @@ func (g *SpriteGenerator) generateSpriteImage(encoder *ffmpeg.Encoder) error {
 }
 
 func (g *SpriteGenerator) generateSpriteVTT(encoder *ffmpeg.Encoder) error {
+	if g.vttExists() {
+		return nil
+	}
 	logger.Infof("[generator] generating sprite vtt for %s", g.Info.VideoFile.Path)
 
 	spriteImage, err := imaging.Open(g.ImageOutputPath)
@@ -134,5 +140,15 @@ func (g *SpriteGenerator) generateSpriteVTT(encoder *ffmpeg.Encoder) error {
 	}
 	vtt := strings.Join(vttLines, "\n")
 
-	return ioutil.WriteFile(g.VTTOutputPath, []byte(vtt), 0755)
+	return ioutil.WriteFile(g.VTTOutputPath, []byte(vtt), 0644)
+}
+
+func (g *SpriteGenerator) imageExists() bool {
+	exists, _ := utils.FileExists(g.ImageOutputPath)
+	return exists
+}
+
+func (g *SpriteGenerator) vttExists() bool {
+	exists, _ := utils.FileExists(g.VTTOutputPath)
+	return exists
 }
diff --git a/pkg/manager/jsonschema/utils.go b/pkg/manager/jsonschema/utils.go
index 362023b17..18e180cf3 100644
--- a/pkg/manager/jsonschema/utils.go
+++ b/pkg/manager/jsonschema/utils.go
@@ -20,7 +20,7 @@ func marshalToFile(filePath string, j interface{}) error {
 	if err != nil {
 		return err
 	}
-	return ioutil.WriteFile(filePath, data, 0755)
+	return ioutil.WriteFile(filePath, data, 0644)
 }
 
 func encode(j interface{}) ([]byte, error) {
diff --git a/pkg/utils/file.go b/pkg/utils/file.go
index e029c3073..e7088f70f 100644
--- a/pkg/utils/file.go
+++ b/pkg/utils/file.go
@@ -60,7 +60,7 @@ func Touch(path string) error {
 func EnsureDir(path string) error {
 	exists, err := FileExists(path)
 	if !exists {
-		err = os.Mkdir(path, 0755)
+		err = os.Mkdir(path, 0644)
 		return err
 	}
 	return err