diff --git a/src/parsers/completion_parser.cr b/src/parsers/completion_parser.cr
index 1cdc4cc..3a068f9 100644
--- a/src/parsers/completion_parser.cr
+++ b/src/parsers/completion_parser.cr
@@ -12,11 +12,11 @@ module GX::Parsers
       )
       parser.separator("\nCompletion commands:")
 
-      parser.on("--bash", "Generate bash completion") do |flag|
+      parser.on("--bash", "Generate bash completion") do |_|
         Log.info { "Set bash completion" }
       end
 
-      parser.on("--zsh", "Generate zsh completion") do |flag|
+      parser.on("--zsh", "Generate zsh completion") do |_|
         Log.info { "Set zsh completion" }
       end