diff --git a/README.rst b/README.rst
index 7706506..35cb52d 100644
--- a/README.rst
+++ b/README.rst
@@ -59,13 +59,14 @@ Usage
         Patch an APK with the Frida gadget library
     
       Options:
-        --arch TEXT       Target architecture of the device. (options: arm64, x86_64, arm, x86)
-        --use-aapt2       Use aapt2 instead of aapt.
-        --no-res          Do not decode resources.
-        --skip-decompile  Skip decompilation if desired.
-        --skip-recompile  Skip recompilation if desired.
-        --version         Show version and exit.
-        --help            Show this message and exit.
+        --arch TEXT           Target architecture of the device. (options: arm64, x86_64, arm, x86)
+        --main-activity TEXT  Specify the main activity
+        --use-aapt2           Use aapt2 instead of aapt.
+        --no-res              Do not decode resources.
+        --skip-decompile      Skip decompilation if desired.
+        --skip-recompile      Skip recompilation if desired.
+        --version             Show version and exit.
+        --help                Show this message and exit.
 
 How do I begin?
 ~~~~~~~~~~~~~~~~~~~~~~
diff --git a/scripts/cli.py b/scripts/cli.py
index 4b0fa4b..7e67125 100644
--- a/scripts/cli.py
+++ b/scripts/cli.py
@@ -176,7 +176,7 @@ def modify_manifest(decompiled_path):
                             ':extractNativeLibs="true"')
     android_manifest.write_text(txt, encoding="utf-8")
 
-def inject_gadget_into_apk(apk_path:str, arch:str, decompiled_path:str, main_activity:str=None):
+def inject_gadget_into_apk(apk_path:str, arch:str, decompiled_path:str, main_activity:str = None):
     """Inject frida gadget into an APK
 
     Args: