diff --git a/install.sh b/install.sh
index ee7257e6..f1e303d7 100755
--- a/install.sh
+++ b/install.sh
@@ -52,7 +52,7 @@ fi
 
 # --- Usage ---
 if [[ $# -eq 0 ]]; then
-    echo "Usage: $0 [--target <claude|cursor>] <language> [<language> ...]"
+    echo "Usage: $0 [--target <claude|cursor|antigravity>] <language> [<language> ...]"
     echo ""
     echo "Targets:"
     echo "  claude       (default) — Install rules to ~/.claude/rules/"