diff --git a/const.go b/const.go
index ed9ae9d..10698fb 100644
--- a/const.go
+++ b/const.go
@@ -7,10 +7,12 @@ type ProjectLanguage string
 const (
 	LanguageGolang     ProjectLanguage = "go"
 	LanguageJava       ProjectLanguage = "java"
+	LanguageKotlin     ProjectLanguage = "kotlin"
 	LanguageJavascript ProjectLanguage = "javascript"
 	LanguageTypescript ProjectLanguage = "typescript"
 	LanguagePython     ProjectLanguage = "python"
 	LanguagePHP        ProjectLanguage = "php"
+	LanguageRust       ProjectLanguage = "rust"
 )
 
 type ProjectBuildSystem string
@@ -29,6 +31,7 @@ const (
 	BuildSystemMkdocs          ProjectBuildSystem = "mkdocs"
 	BuildSystemComposer        ProjectBuildSystem = "composer"
 	BuildSystemDotNet          ProjectBuildSystem = "dotnet"
+	BuildSystemCargo           ProjectBuildSystem = "cargo"
 )
 
 type ProjectBuildSystemSyntax string