diff --git a/Project.toml b/Project.toml
index cb96d7e..f76b384 100644
--- a/Project.toml
+++ b/Project.toml
@@ -7,6 +7,7 @@ version = "0.4.7"
 Distributed = "8ba89e20-285c-5b6f-9357-94700520ee1b"
 EllipsisNotation = "da5c29d0-fa7d-589e-88eb-ea29b0a81949"
 FastMPOContractions = "f6e391d2-8ffa-4d7a-98cd-7e70024481ca"
+ITensorMPS = "0d1a4710-d33b-49a5-8f18-73bdf49b47e2"
 ITensors = "9136182c-28ba-11e9-034c-db9fb085ebd5"
 LinearAlgebra = "37e2e46d-f89d-539d-b4ee-838fcccc9c8e"
 OrderedCollections = "bac558e1-5e72-5ebc-8fee-abe8a469f55d"
@@ -19,13 +20,14 @@ Aqua = "0.8.9"
 EllipsisNotation = "1"
 FastMPOContractions = "0.2.2"
 HubbardAtoms = "0.1.0"
-ITensors = "0.6"
+ITensorMPS = "0.3.2"
+ITensors = "0.7"
 JET = "0.9.12"
 OrderedCollections = "1"
-Quantics = "0.3"
+Quantics = "0.4"
 QuanticsGrids = "0.3.2"
 SparseIR = "1.0.19"
-TCIITensorConversion = "0.1"
+TCIITensorConversion = "0.2"
 TensorCrossInterpolation = "0.9.7"
 julia = "1.10"
 
diff --git a/src/TCIAlgorithms.jl b/src/TCIAlgorithms.jl
index 66889b9..fa9fbd1 100644
--- a/src/TCIAlgorithms.jl
+++ b/src/TCIAlgorithms.jl
@@ -6,6 +6,8 @@ import TensorCrossInterpolation:
 
 using TCIITensorConversion
 using ITensors
+using ITensorMPS: ITensorMPS
+using ITensorMPS: MPO, MPS, linkdims, linkinds
 using Quantics
 
 using OrderedCollections: OrderedDict, OrderedSet
diff --git a/src/itensor.jl b/src/itensor.jl
index 86e2742..9bcd49c 100644
--- a/src/itensor.jl
+++ b/src/itensor.jl
@@ -41,7 +41,7 @@ function ProjMPSContainer(::Type{T}, projttcont::ProjTTContainer{T}, sites) wher
 end
 
 # Conversion Functions
-ITensors.MPS(projΨ::ProjMPS) = projΨ.data
+ITensorMPS.MPS(projΨ::ProjMPS) = projΨ.data
 
 function ProjTensorTrain{T}(projΨ::ProjMPS) where {T}
     return ProjTensorTrain{T}(
@@ -211,7 +211,7 @@ end
 # Quantics Functions
 function Quantics.makesitediagonal(projmps::ProjMPS, site::Index)
     mps_diagonal = Quantics.makesitediagonal(MPS(projmps), site)
-    sites_diagonal = siteinds(all, mps_diagonal)
+    sites_diagonal = ITensors.SiteTypes.siteinds(all, mps_diagonal)
     projmps_diagonal = ProjMPS(mps_diagonal, sites_diagonal)
 
     prjsiteinds = Dict{Index{Int},Int}()
@@ -230,10 +230,12 @@ end
 
 function Quantics.makesitediagonal(projmps::ProjMPS, tag::String)
     mps_diagonal = Quantics.makesitediagonal(MPS(projmps), tag)
-    sites_diagonal = siteinds(all, mps_diagonal)
+    sites_diagonal = ITensors.SiteTypes.siteinds(all, mps_diagonal)
     projmps_diagonal = ProjMPS(mps_diagonal, sites_diagonal)
 
-    target_positions = Quantics.findallsiteinds_by_tag(siteinds(MPS(projmps)); tag=tag)
+    target_positions = Quantics.findallsiteinds_by_tag(
+        ITensors.SiteTypes.siteinds(MPS(projmps)); tag=tag
+    )
     prjsiteinds = Dict{Index{Int},Int}()
     for (p, s) in zip(projmps.projector, projmps.sites)
         for (p_, s_) in zip(p, s)
@@ -256,7 +258,7 @@ end
 
 function Quantics.extractdiagonal(projmps::ProjMPS, tag::String)
     mps_diagonal = Quantics.extractdiagonal(MPS(projmps), tag)
-    sites_diagonal = siteinds(all, mps_diagonal)
+    sites_diagonal = ITensors.SiteTypes.siteinds(all, mps_diagonal)
     projmps_diagonal = ProjMPS(mps_diagonal, sites_diagonal)
     sites_diagonal_set = Set(Iterators.flatten(sites_diagonal))
 
diff --git a/src/projtensortrain.jl b/src/projtensortrain.jl
index 63f977a..5134608 100644
--- a/src/projtensortrain.jl
+++ b/src/projtensortrain.jl
@@ -245,9 +245,9 @@ function add(
     # HS: TCI.add does not use a relative tolerance.
     # For the moment, we need to use ITensors.add instead
     a_MPS = MPS(a.data)
-    b_MPS = MPS(b.data; sites=siteinds(a_MPS))
+    b_MPS = MPS(b.data; sites=ITensors.SiteTypes.siteinds(a_MPS))
     ab_MPS = +(a_MPS, b_MPS; alg="directsum")
-    truncate!(ab_MPS; maxdim=maxbonddim, cutoff=tolerance^2)
+    ITensors.truncate!(ab_MPS; maxdim=maxbonddim, cutoff=tolerance^2)
     ab = reshape(ProjTensorTrain(TensorTrain{T,3}(MPO([x for x in ab_MPS]))), a.sitedims)
     return project(ab, a.projector | b.projector)
 end
diff --git a/test/itensor_tests.jl b/test/itensor_tests.jl
index 88c14aa..9dc2901 100644
--- a/test/itensor_tests.jl
+++ b/test/itensor_tests.jl
@@ -6,6 +6,7 @@ using Quantics
 import TCIAlgorithms: Projector, project, ProjTensorTrain, LazyMatrixMul, makeprojectable
 
 using ITensors
+using ITensorMPS
 
 @testset "itensor" begin
     @testset "ProjMPS" begin