diff --git a/zshrc b/zshrc
index 9260b24..9bc4485 100644
--- a/zshrc
+++ b/zshrc
@@ -1,3 +1,8 @@
+# skip customization for non-interactive shells
+if [[ ! -o interactive ]]; then
+  return
+fi
+
 # completion system
 autoload -U compinit; compinit