diff --git a/README-for-release-zip.md b/README-for-release-zip.md
index 081080d..52235b5 100644
--- a/README-for-release-zip.md
+++ b/README-for-release-zip.md
@@ -17,7 +17,7 @@ Installation:
 
 1. [Download](https://github.com/til-schneider/slim-wiki/releases/latest) the latest `slim-wiki.zip`.
 2. Extract the zip and put the contents on your webspace.
-3. Create a `config.xml` (copy and adjust the example).
+3. Create a `config.php` (copy and adjust the example).
 4. Give write permissions to the server for the directory `data` (including subdirectories and files).
 
 
diff --git a/README.md b/README.md
index 27471cd..c376347 100644
--- a/README.md
+++ b/README.md
@@ -67,7 +67,7 @@ Build a release zip:
 
 1. Build the project (see above).
 2. Copy the contents of the `dist` directory to your webspace.
-3. Create a `config.xml` (copy and adjust the example).
+3. Create a `config.php` (copy and adjust the example).
 4. Give write permissions to the server for the directory `data` (including subdirectories and files).