diff --git a/README.md b/README.md
index b683afa..8757e42 100755
--- a/README.md
+++ b/README.md
@@ -59,25 +59,25 @@ src/gemini-dl.php --source gemini://.. --target /path/to/download
 ``` bash
 ## Required
 
-    -s, --source   - string, gemini protocol address
-    -t, --target   - string, absolute path to destination folder
+  -s, --source   - string, gemini protocol address
+  -t, --target   - string, absolute path to destination folder
 
 ## Optional
 
-    -c, --crawl    - no value, crawl document links (entire capsule download), disabled by default
-    -d, --delay    - integer, pause between requests (seconds), 1 by default
-    -i, --index    - string, index filename of directory listing, index.gmi by default
-    -h, --help     - no value, show available commands
-    -k, --keep     - no value, keep original links (--crawl mode only), disabled by default
-    -m, --match    - string, collect links match regex rule, /.*/ by default
-    -r, --raw      - no value, include meta headers (--keep option ignored), disabled by default
-    -u, --unique   - no value, append snap version as folder timestamp, disabled by default
+  -c, --crawl    - no value, crawl document links (entire capsule download), disabled by default
+  -d, --delay    - integer, pause between requests (seconds), 1 by default
+  -i, --index    - string, index filename of directory listing, index.gmi by default
+  -h, --help     - no value, show available commands
+  -k, --keep     - no value, keep original links (--crawl mode only), disabled by default
+  -m, --match    - string, collect links match regex rule, /.*/ by default
+  -r, --raw      - no value, include meta headers (--keep option ignored), disabled by default
+  -u, --unique   - no value, append snap version as folder timestamp, disabled by default
 
 ## Experimental (in development)
 
-    -e, --external - no value, follow external hosts, disabled by default
-    -f, --follow   - integer, follow redirects on --crawl, 0 by default
-    -l, --level    - integer, depth to --crawl, 0 by default
+  -e, --external - no value, follow external hosts, disabled by default
+  -f, --follow   - integer, follow redirects on --crawl, 0 by default
+  -l, --level    - integer, depth to --crawl, 0 by default
 ```
 
 * show in CLI: `gemini-dl.php --help`
\ No newline at end of file
diff --git a/help.gmi b/help.gmi
index a8ac462..7320a2b 100755
--- a/help.gmi
+++ b/help.gmi
@@ -8,26 +8,26 @@
 
 # Usage
 
-    gemini-dl.php --source gemini://.. --target /path/to/download
+  gemini-dl.php --source gemini://.. --target /path/to/download
 
 ## Required
 
-    -s, --source   - string, gemini protocol address
-    -t, --target   - string, absolute path to destination folder
+  -s, --source   - string, gemini protocol address
+  -t, --target   - string, absolute path to destination folder
 
 ## Optional
 
-    -c, --crawl    - no value, crawl document links (entire capsule download), disabled by default
-    -d, --delay    - integer, pause between requests (seconds), 1 by default
-    -i, --index    - string, index filename of directory listing, index.gmi by default
-    -h, --help     - no value, show available commands
-    -k, --keep     - no value, keep original links (--crawl mode only), disabled by default
-    -m, --match    - string, collect links match regex rule, /.*/ by default
-    -r, --raw      - no value, include meta headers (--keep option ignored), disabled by default
-    -u, --unique   - no value, append snap version as folder timestamp, disabled by default
+  -c, --crawl    - no value, crawl document links (entire capsule download), disabled by default
+  -d, --delay    - integer, pause between requests (seconds), 1 by default
+  -i, --index    - string, index filename of directory listing, index.gmi by default
+  -h, --help     - no value, show available commands
+  -k, --keep     - no value, keep original links (--crawl mode only), disabled by default
+  -m, --match    - string, collect links match regex rule, /.*/ by default
+  -r, --raw      - no value, include meta headers (--keep option ignored), disabled by default
+  -u, --unique   - no value, append snap version as folder timestamp, disabled by default
 
 ## Experimental (in development)
 
-    -e, --external - no value, follow external hosts, disabled by default
-    -f, --follow   - integer, follow redirects on --crawl, 0 by default
-    -l, --level    - integer, depth to --crawl, 0 by default
+  -e, --external - no value, follow external hosts, disabled by default
+  -f, --follow   - integer, follow redirects on --crawl, 0 by default
+  -l, --level    - integer, depth to --crawl, 0 by default