diff --git a/core/assets/scaffold/files/robots.txt b/core/assets/scaffold/files/robots.txt
index ebcd04b96ca44df954dd08eece579ea293c6566b..3ad8e2e8dec097f3224437b559c394dc9f6479a1 100644
--- a/core/assets/scaffold/files/robots.txt
+++ b/core/assets/scaffold/files/robots.txt
@@ -37,7 +37,15 @@ Allow: /profiles/*.svg
 Disallow: /core/
 Disallow: /profiles/
 # Files
-Disallow: /README.txt
+Disallow: /README.md
+Disallow: /composer/Metapackage/README.txt
+Disallow: /composer/Plugin/ProjectMessage/README.md
+Disallow: /composer/Plugin/Scaffold/README.md
+Disallow: /composer/Plugin/VendorHardening/README.txt
+Disallow: /composer/Template/README.txt
+Disallow: /modules/README.txt
+Disallow: /sites/README.txt
+Disallow: /themes/README.txt
 Disallow: /web.config
 # Paths (clean URLs)
 Disallow: /admin/
diff --git a/robots.txt b/robots.txt
index ebcd04b96ca44df954dd08eece579ea293c6566b..3ad8e2e8dec097f3224437b559c394dc9f6479a1 100644
--- a/robots.txt
+++ b/robots.txt
@@ -37,7 +37,15 @@ Allow: /profiles/*.svg
 Disallow: /core/
 Disallow: /profiles/
 # Files
-Disallow: /README.txt
+Disallow: /README.md
+Disallow: /composer/Metapackage/README.txt
+Disallow: /composer/Plugin/ProjectMessage/README.md
+Disallow: /composer/Plugin/Scaffold/README.md
+Disallow: /composer/Plugin/VendorHardening/README.txt
+Disallow: /composer/Template/README.txt
+Disallow: /modules/README.txt
+Disallow: /sites/README.txt
+Disallow: /themes/README.txt
 Disallow: /web.config
 # Paths (clean URLs)
 Disallow: /admin/