diff --git a/pyproject.toml b/pyproject.toml
index fe9066e1..f98951e2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -15,7 +15,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "quantum-pecos"
-version = "0.5.0.dev7"
+version = "0.5.0.dev8"
 authors = [
     {name = "The PECOS Developers"},
 ]
@@ -28,7 +28,7 @@ requires-python = ">=3.10"
 license = { file = "LICENSE"}
 keywords = ["quantum", "QEC", "simulation", "PECOS"]
 dependencies = [
-    "phir~=0.2.1",
+    "phir~=0.3.0",
     "numpy>=1.15.0,<2.0",
     "scipy>=1.1.0,<2.0",
     "networkx>=2.1.0,<3.0",
diff --git a/python/pecos/decoders/mwpm2d/mwpm2d.py b/python/pecos/decoders/mwpm2d/mwpm2d.py
index a8774e3d..03fc5298 100644
--- a/python/pecos/decoders/mwpm2d/mwpm2d.py
+++ b/python/pecos/decoders/mwpm2d/mwpm2d.py
@@ -48,7 +48,7 @@ def decode(self, measurements, error_params=None):
 
         logic_range identifies over what part of self.logic we are decoding over.
         """
-        syndromes = measurements.simplified(True)
+        syndromes = set(measurements.simplified(True))
 
         tuple_key = frozenset(syndromes)
 
diff --git a/requirements.txt b/requirements.txt
index f2cf9141..5ed3348b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ mdurl==0.1.2
 networkx==2.8.8
 numpy==1.26.3
 packaging==23.2
-phir==0.2.1
+phir==0.3.0
 pillow==10.2.0
 pluggy==1.4.0
 pydantic==2.6.0
diff --git a/tests/integration/test_phir.py b/tests/integration/test_phir.py
index 3bae3d8c..b2a3d174 100644
--- a/tests/integration/test_phir.py
+++ b/tests/integration/test_phir.py
@@ -294,7 +294,6 @@ def test_bell_qparallel_cliff_barrier():
     results (with Clifford circuits and stabilizer sim)."""
 
     interp = PHIRClassicalInterpreter()
-    interp.phir_validate = False
 
     results = HybridEngine(qsim="stabilizer", cinterp=interp).run(
         program=json.load(Path.open(this_dir / "phir" / "bell_qparallel_cliff_barrier.json")),
@@ -310,7 +309,6 @@ def test_bell_qparallel_cliff_ifbarrier():
     returns expected results (with Clifford circuits and stabilizer sim)."""
 
     interp = PHIRClassicalInterpreter()
-    interp.phir_validate = False
 
     results = HybridEngine(qsim="stabilizer", cinterp=interp).run(
         program=json.load(Path.open(this_dir / "phir" / "bell_qparallel_cliff_ifbarrier.json")),