diff --git a/experimental/xformer/BUILD b/experimental/xformer/BUILD
index f3a36a4a3..8ee2e2965 100644
--- a/experimental/xformer/BUILD
+++ b/experimental/xformer/BUILD
@@ -144,11 +144,11 @@ cc_library(
 
 cc_binary(
     name = "xcore-opt",
-    srcs = ["XCoreOptMain.cpp"],
+    srcs = ["XCoreOptMain.cpp", "Version.h"],
     deps = [
         ":xcore_passes",
         ":utils",
-        "@lib_tflite_micro//:shared_header",
+        "@lib_tflite_micro//:shared_headers",
         "@llvm-project//mlir:IR",
         "@llvm-project//mlir:StandardOps",
         "@llvm-project//mlir:QuantOps",
diff --git a/experimental/xformer/Version.h b/experimental/xformer/Version.h
new file mode 100644
index 000000000..c7215b8df
--- /dev/null
+++ b/experimental/xformer/Version.h
@@ -0,0 +1,15 @@
+// Copyright 2021 XMOS LIMITED. This Software is subject to the terms of the
+// XMOS Public License: Version 1
+
+#ifndef XFORMER_VERSION_H_
+#define XFORMER_VERSION_H_
+
+namespace xformer {
+
+unsigned majorVersion = 0;
+unsigned minorVersion = 1;
+unsigned patchVersion = 6;
+
+} // namespace xformer
+
+#endif // XFORMER_VERSION_H_
\ No newline at end of file
diff --git a/experimental/xformer/WORKSPACE b/experimental/xformer/WORKSPACE
index bbb96c630..cf908b9bc 100644
--- a/experimental/xformer/WORKSPACE
+++ b/experimental/xformer/WORKSPACE
@@ -23,6 +23,7 @@ http_archive(
     patch_tool = "patch",
     patches = [
         "//patches:llvm_update.patch",
+        "//patches:flatbuffer_export.patch",
     ],
     sha256 = "e68c1d346fc3d529653530ca346b2c62f5b31bd4fcca7ffc9c65bb39ab2f6ed3",
     strip_prefix = "tensorflow-2.6.2",
diff --git a/experimental/xformer/XCoreOptMain.cpp b/experimental/xformer/XCoreOptMain.cpp
index 96642e312..599132c0f 100644
--- a/experimental/xformer/XCoreOptMain.cpp
+++ b/experimental/xformer/XCoreOptMain.cpp
@@ -5,7 +5,10 @@
 #include "Transforms/Options.h"
 #include "Transforms/Passes.h"
 #include "Utils/FileIO.h"
+#include "Version.h"
 
+#include "lib_nn/api/version.h"
+#include "lib_tflite_micro/api/version.h"
 #include "lib_tflite_micro/api/xcore_shared_config.h"
 #include "mlir/IR/AsmState.h"
 #include "mlir/Parser.h"
@@ -181,7 +184,19 @@ int main(int argc, char **argv) {
     int requiredThreadCount = module->getAttr(xcRequiredThreadCountAttrName)
                                   .cast<mlir::IntegerAttr>()
                                   .getInt();
+
     struct shared_config::xcore_metadata cfg;
+    // Store version info
+    cfg.lib_nn_major_version = lib_nn::major_version;
+    cfg.lib_nn_minor_version = lib_nn::minor_version;
+    cfg.lib_nn_patch_version = lib_nn::patch_version;
+    cfg.lib_tflite_micro_major_version = lib_tflite_micro::major_version;
+    cfg.lib_tflite_micro_minor_version = lib_tflite_micro::minor_version;
+    cfg.lib_tflite_micro_patch_version = lib_tflite_micro::patch_version;
+    cfg.xformer_major_version = xformer::majorVersion;
+    cfg.xformer_minor_version = xformer::minorVersion;
+    cfg.xformer_patch_version = xformer::patchVersion;
+    // Store number of threads needed to execute the model
     cfg.required_thread_count = requiredThreadCount;
     auto bufferData =
         std::string((char *)&cfg, sizeof(shared_config::xcore_metadata));
diff --git a/experimental/xformer/lib_tflite_micro.BUILD b/experimental/xformer/lib_tflite_micro.BUILD
index c9c946c3e..9fc338fe3 100644
--- a/experimental/xformer/lib_tflite_micro.BUILD
+++ b/experimental/xformer/lib_tflite_micro.BUILD
@@ -3,8 +3,9 @@ package(
 )
 
 cc_library(
-    name = "shared_header",
+    name = "shared_headers",
     srcs = [
+        "lib_tflite_micro/api/version.h",
         "lib_tflite_micro/api/xcore_shared_config.h",
     ],
 )
diff --git a/experimental/xformer/patches/flatbuffer_export.patch b/experimental/xformer/patches/flatbuffer_export.patch
new file mode 100644
index 000000000..f8254e97e
--- /dev/null
+++ b/experimental/xformer/patches/flatbuffer_export.patch
@@ -0,0 +1,20 @@
+--- tensorflow/compiler/mlir/lite/flatbuffer_export.cc	2022-03-28 16:22:27.000000000 +0100
++++ tensorflow/compiler/mlir/lite/flatbuffer_export.cc	2022-03-28 16:21:41.000000000 +0100
+@@ -1553,10 +1553,13 @@
+       BuildMetadata("min_runtime_version", std::string(kByteStringSize, '\0')));
+   for (const auto& kv : metadata_) {
+     const std::string& val = kv.second;
+-    // Only take the first kByteStringSize values.
+-    const int count = std::min(kByteStringSize, val.length());
+-    std::string value = std::string(kByteStringSize, '\0')
+-                            .assign(val.begin(), val.begin() + count);
++    if(val.length() % 16 != 0) {
++      module_.emitError(
++            "metadata string must be aligned to 16 bytes");
++        return llvm::None;
++      }
++    std::string value = std::string(val.length(), '\0')
++                            .assign(val.begin(), val.begin() + val.length());
+     metadata.push_back(BuildMetadata(kv.first, value));
+   }
+   return builder_.CreateVector(metadata);
diff --git a/third_party/lib_nn b/third_party/lib_nn
index 970c278cb..7549c354e 160000
--- a/third_party/lib_nn
+++ b/third_party/lib_nn
@@ -1 +1 @@
-Subproject commit 970c278cbc3fa7d61bfb38011289a43e70a61251
+Subproject commit 7549c354e884e8e38c10637b8d129213fdd31686
diff --git a/third_party/lib_tflite_micro b/third_party/lib_tflite_micro
index 89ee342c2..4ae6db264 160000
--- a/third_party/lib_tflite_micro
+++ b/third_party/lib_tflite_micro
@@ -1 +1 @@
-Subproject commit 89ee342c2f6f9ff65d4f9199021701ec2f9387ae
+Subproject commit 4ae6db26482faf092fa2f2732b9b40ec95bd1d40