diff --git a/README.md b/README.md
index dc39ac7..b3f46f3 100644
--- a/README.md
+++ b/README.md
@@ -64,6 +64,11 @@ Sketch.addPreview('/path/to/preview.png');
 newSketch.build('newSketch.sketch');
 ```
 
+### Temporary files
+
+This library by defaults uses `.sketch-constructor` directory for placing temporary files like Bitmap images or preview.
+We provide APIs to change default temporary directory by providing `STORAGE_DIR` environment variable.
+
 ### Read/manipulate an existing Sketch file
 Getting data from or manipulating an existing Sketch file.
 
diff --git a/utils/paths.js b/utils/paths.js
index 8b0b14b..c0667be 100644
--- a/utils/paths.js
+++ b/utils/paths.js
@@ -12,14 +12,14 @@
  */
 
 /**
- * Path to the temporary local image folder
+ * Path to the temporary sketch constructor folder
  */
-const STORAGE_IMG_DIR = '.sketch-constructor/images';
+const STORAGE_DIR = process.env.STORAGE_DIR || '.sketch-constructor';
 
 /**
- * Path to the temporary sketch constructor folder
+ * Path to the temporary local image folder
  */
-const STORAGE_DIR = '.sketch-constructor';
+const STORAGE_IMG_DIR = `${STORAGE_DIR}/images`;
 
 /**
  * Path to directory with preview file