diff --git a/bash/alias/bash.sh b/bash/alias/bash.sh
index 65a7bda..40500cc 100644
--- a/bash/alias/bash.sh
+++ b/bash/alias/bash.sh
@@ -4,6 +4,12 @@ cd \
 .. \
 "
 
+# change current directory to its parent's parent
+alias ...="\
+cd \
+../.. \
+"
+
 # swap directory (current ↔ previous)
 alias sd="\
 cd \