diff --git a/README.md b/README.md
index d5d1868..72f1135 100644
--- a/README.md
+++ b/README.md
@@ -1,9 +1,22 @@
 # dsearch
-File duplicates scanner. Usage example:
-``` bash
-dsearch -d /home/user/docs
+File duplicates scanner. 
+## Usage
 ```
+dsearch [Options]
 
+Options:
+  -h,--help                   Print this help message and exit
+  -d,--directory TEXT         Root directory for search; default: cwd
+  -a,--algorithms TEXT ...    Search algorithms: name, size, head, hash; default: 'name size head hash'
+    name - compares file name
+    size - compares file size
+    head - compares only first 4096 bytes file block
+    hash - compares whole file hashes
+```
+Example:
+``` bash
+dsearch -d /path/to/root -a 'name size'
+```
 ## Info
 * Contains docker file for build evironment.
 * catch2 https://github.com/catchorg/Catch2
diff --git a/cli/main.cpp b/cli/main.cpp
index 7176f71..895c989 100644
--- a/cli/main.cpp
+++ b/cli/main.cpp
@@ -27,8 +27,8 @@ int main(int argc, char **argv) {
 
     std::string directory = std::filesystem::current_path().string();
     std::vector<std::string> algorithms = standardAlgorithms;
-    app.add_option("-d,--directory", directory);
-    app.add_option("-als,--algorithms", algorithms);
+    app.add_option("-d,--directory", directory, "Root directory for search; default: cwd");
+    app.add_option("-a,--algorithms", algorithms, "Search algorithms: name, size, head, hash; default: 'name size head hash'");
 
     CLI11_PARSE(app, argc, argv);