diff --git a/README.md b/README.md
index 88fa8e7..7c23c29 100644
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@ swift run -c release ResgenSwift strings twine $FORCE_FLAG "./Twine/strings.txt"
 2. Input translations file (must be Twine formatted)
 3. `--langs`: langs to generate (string with space between each lang)
 4. `--default-lang`: default lang that will be in `Base.lproj`. It must be in `langs` as well
-4. `--extension-output-path`: path where to generate generated extension
+5. `--extension-output-path`: path where to generate generated extension
 
 ### Stringium (recommended)
 
@@ -93,6 +93,7 @@ swift run -c release ResgenSwift strings stringium $FORCE_FLAG "./Strings/string
  --extension-output-path "./Strings/Generated" \
  --extension-name "AppString" \
  --extension-suffix "GreatApp" \
+ --xcStrings true
  --static-members true
 ```
 
@@ -105,6 +106,7 @@ swift run -c release ResgenSwift strings stringium $FORCE_FLAG "./Strings/string
 4. `--extension-output-path`: path where to generate generated extension
 5. `--extension-name` *(optional)* : name of class to add the extension
 6. `--extension-suffix` *(optional)* : additional text which is added to filename (ex: `AppString+GreatApp.swift`)
+6. `--xcStrings`*(optional)* : generate string catalog
 7. `--static-members` *(optional)*: generate static properties or not