diff --git a/pyproject.toml b/pyproject.toml
index aab7e195..ace0a895 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,6 +22,7 @@ dynamic = ["version"]
 
 dependencies = [
     "mqt.core>=3.8.0",
+    "mqt.ddsim>=2.6.0",
     "qiskit>=2.0.3",
     "qiskit_aer>=0.16.4; python_version < '3.14'",
     "numpy>=1.24",
diff --git a/src/mqt/problemsolver/csp.py b/src/mqt/problemsolver/csp.py
index aa1f174d..90d863fc 100644
--- a/src/mqt/problemsolver/csp.py
+++ b/src/mqt/problemsolver/csp.py
@@ -12,7 +12,7 @@
 
 import numpy as np
 from mqt.core import load
-from mqt.core.dd import sample
+from mqt.ddsim import sample
 from qiskit import QuantumCircuit, QuantumRegister
 
 if TYPE_CHECKING:
diff --git a/src/mqt/problemsolver/tsp.py b/src/mqt/problemsolver/tsp.py
index bab6ccf6..58997ae3 100644
--- a/src/mqt/problemsolver/tsp.py
+++ b/src/mqt/problemsolver/tsp.py
@@ -15,7 +15,7 @@
 import networkx as nx
 import numpy as np
 from mqt.core import load
-from mqt.core.dd import sample
+from mqt.ddsim import sample
 from python_tsp.exact import solve_tsp_dynamic_programming
 from qiskit import ClassicalRegister, QuantumCircuit, QuantumRegister
 from qiskit.synthesis.qft import synth_qft_full