diff --git a/src/PEPSKit.jl b/src/PEPSKit.jl
index 1446beed..5994ce9c 100644
--- a/src/PEPSKit.jl
+++ b/src/PEPSKit.jl
@@ -1,6 +1,7 @@
 module PEPSKit
 
 using LinearAlgebra, Statistics, Base.Threads, Base.Iterators, Printf
+using Base: @kwdef
 using Accessors
 using VectorInterface
 using TensorKit, KrylovKit, MPSKit, OptimKit