diff --git a/README-cn.md b/README-cn.md
index 7ef1d9e..05b88f7 100644
--- a/README-cn.md
+++ b/README-cn.md
@@ -172,7 +172,7 @@ Optional parameters
    level: str, just one of ('L','M','Q','H')
    picutre: str, a filename of a image
    colorized: bool
-   constrast: float
+   contrast: float
    brightness: float
    save_name: str, the output filename like 'example.png'
    save_dir: str, the output directory
diff --git a/README.md b/README.md
index ebe6478..f92d10e 100644
--- a/README.md
+++ b/README.md
@@ -183,7 +183,7 @@ Optional parameters
    level: str, just one of ('L','M','Q','H')
    picutre: str, a filename of a image
    colorized: bool
-   constrast: float
+   contrast: float
    brightness: float
    save_name: str, the output filename like 'example.png'
    save_dir: str, the output directory
diff --git a/amzqr/amzqr.py b/amzqr/amzqr.py
index 35a506e..6c8377c 100755
--- a/amzqr/amzqr.py
+++ b/amzqr/amzqr.py
@@ -13,7 +13,7 @@
 #   level: str, just one of ('L','M','Q','H')
 #   picutre: str, a filename of a image
 #   colorized: bool
-#   constrast: float
+#   contrast: float
 #   brightness: float
 #   save_name: str, the output filename like 'example.png'
 #   save_dir: str, the output directory
diff --git a/setup.py b/setup.py
index 7fafbe9..75ca5a6 100644
--- a/setup.py
+++ b/setup.py
@@ -8,7 +8,7 @@
     name='amzqr',
     version='0.0.2',
     keywords='qr qrcode amazing artistic animated gif colorized',
-    description='Generater for amazing QR Codes. Including Common, Artistic and Animated QR Codes.',
+    description='Generator for amazing QR Codes. Including Common, Artistic and Animated QR Codes.',
     long_description=long_description,
     long_description_content_type="text/markdown",
     author='hw',