diff --git a/noxfile.py b/noxfile.py
index 31cb10dc5..cee275ef1 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -42,7 +42,7 @@
     "packaging",
     "protobuf",
 )
-ONNX_IR = "onnx_ir==0.1.1"
+ONNX_IR = "onnx_ir==0.1.3"
 ONNX_IR_MAIN = "git+https://github.com/onnx/ir-py.git@main#egg=onnx_ir"
 
 
diff --git a/onnxscript/optimizer/_optimizer.py b/onnxscript/optimizer/_optimizer.py
index e017ee205..ba03a44d9 100644
--- a/onnxscript/optimizer/_optimizer.py
+++ b/onnxscript/optimizer/_optimizer.py
@@ -56,6 +56,7 @@ def optimize_ir(
         common_passes.CommonSubexpressionEliminationPass(),
         common_passes.LiftConstantsToInitializersPass(),
         common_passes.LiftSubgraphInitializersToMainGraphPass(),
+        common_passes.DeduplicateInitializersPass(),
     ]
     if inline:
         # Inline all functions first before optimizing