diff --git a/Project.toml b/Project.toml
index ac7eccf8..a17b6129 100644
--- a/Project.toml
+++ b/Project.toml
@@ -19,7 +19,7 @@ Adapt = "1, 2, 3.3"
 FFTW = "1.2"
 FillArrays = "0.13, 1"
 LRUCache = "1"
-QuantumInterface = "0.2.1"
+QuantumInterface = "0.2.2"
 Strided = "1, 2"
 UnsafeArrays = "1"
 julia = "1.3"
diff --git a/src/states.jl b/src/states.jl
index 2bd198d1..6c6bdb5b 100644
--- a/src/states.jl
+++ b/src/states.jl
@@ -88,7 +88,6 @@ Hermitian conjugate.
 """
 dagger(x::Bra) = Ket(x.basis, conj(x.data))
 dagger(x::Ket) = Bra(x.basis, conj(x.data))
-Base.adjoint(a::StateVector) = dagger(a)
 
 """
     tensor(x::Ket, y::Ket, z::Ket...)