diff --git a/dprovenancekit/alignment_engine.py b/dprovenancekit/alignment_engine.py
index 1430717..1a56464 100644
--- a/dprovenancekit/alignment_engine.py
+++ b/dprovenancekit/alignment_engine.py
@@ -14,7 +14,6 @@
 from .alignment_interpreter import DefaultAlignmentInterpreter
 from .alignment_matcher import DefaultTraceMatcher
 from .alignment_models import (
-    AlignmentStateKind,
     RegressionLevel,
     RegressionRisk,
     TraceAlignmentResult,