diff --git a/third_party/onnx b/third_party/onnx
index 91dbfff..20835f8 160000
--- a/third_party/onnx
+++ b/third_party/onnx
@@ -1 +1 @@
-Subproject commit 91dbfff2da092e4c5f2aff5d54377f7a4ad12108
+Subproject commit 20835f8f238a232de2f1540fc109de62759e2495
diff --git a/tools/onnx2bnn/OnnxConverter.cpp b/tools/onnx2bnn/OnnxConverter.cpp
index 5a31535..5da62e3 100644
--- a/tools/onnx2bnn/OnnxConverter.cpp
+++ b/tools/onnx2bnn/OnnxConverter.cpp
@@ -193,6 +193,7 @@ std::vector<std::string> OnnxConverter::Convert(
     // for details.
     vector<string> optimizers{"eliminate_nop_pad",
                               "extract_constant_to_initializer",
+                              "dabnn_convert_gemm_with_reshape_or_flatten_to_conv_and_reshape",
                               "dabnn_bconv_strict"};
     if (level == Level::kModerate || level == Level::kAggressive) {
         optimizers.push_back("dabnn_bconv_moderate");