diff --git a/README.md b/README.md
index 192720f..8f1619a 100644
--- a/README.md
+++ b/README.md
@@ -80,3 +80,8 @@ au BufRead,BufNewFile *.mq set filetype=musique
 ### Visual Studio Code
 
 Skopiuj katalog [etc/editor/musique-vscode](etc/editor/musique-vscode) do folderu `<user home>/.vscode/extensions` i uruchom ponownie program VSCode.
+
+# Thanks to
+
+- Creator of [tl::expected](https://github.com/TartanLlama/expected) - [Sy Brand](https://sybrand.ink/)
+- Creator of [bestline](https://github.com/jart/bestline) - [Justine Tunney](https://justinetunney.com/)
diff --git a/src/main.cc b/src/main.cc
index c7d39c9..9b3409c 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -50,6 +50,10 @@ static std::string_view pop(std::span<char const*> &span)
 		"\n"
 		"    --ast\n"
 		"      prints ast for given code\n"
+		"\n"
+		"Thanks to:\n"
+		"  Sy Brand, https://sybrand.ink/, creator of tl::expected https://github.com/TartanLlama/expected\n"
+		"  Justine Tunney, https://justinetunney.com, creator of bestline readline library https://github.com/jart/bestline\n"
 		;
 	std::exit(1);
 }