diff --git a/install.sh b/install.sh
index 5134e90..8b33f77 100755
--- a/install.sh
+++ b/install.sh
@@ -5,7 +5,12 @@
 #   Source this script in your rc:
 #   source /path/to/here/install.sh
 
-SCRIPT_DIR="$(dirname "$(realpath "$0")")"
+# Get script directory for both bash and zsh
+if [ -n "$BASH_SOURCE" ]; then
+    SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+else
+    SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+fi
 BIN_DIR="$SCRIPT_DIR/bin"
 ENV_FILE="$SCRIPT_DIR/.env"