diff --git a/Cargo.lock b/Cargo.lock
index df169f4..5c2cb88 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,6 +1,6 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
-version = 3
+version = 4
 
 [[package]]
 name = "adler"
@@ -415,9 +415,9 @@ dependencies = [
 
 [[package]]
 name = "rten"
-version = "0.14.1"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c272639fd7727a7e8d21dc25b9b674c9021dcd4b663f7425b522b377aaadedd3"
+checksum = "a9c949933c1227e10b0a6ee4e348f47f9715a667804648040872dc0e8cecba4e"
 dependencies = [
  "flatbuffers",
  "num_cpus",
@@ -432,33 +432,33 @@ dependencies = [
 
 [[package]]
 name = "rten-imageproc"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e91b2ce3738cd5b7d38abb2a69007b9032402be65eca7074264a587a6334f0f"
+checksum = "fa140b1c0f2c82f04b87ae637ef86d04cc04b8ea7c834c63c74464699d76c7b3"
 dependencies = [
  "rten-tensor",
 ]
 
 [[package]]
 name = "rten-simd"
-version = "0.14.1"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e491fbae05cf42d15fa282fe4a9ef2e32a8d088b267764412e71b39015bdcd50"
+checksum = "110b90ce15adb254df4887e113ec9114722b9d948f3fb0aeb3722dc141bad085"
 
 [[package]]
 name = "rten-tensor"
-version = "0.14.1"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3537b3a982a7e5ed5d0487a6c708f5d89c1fd418830fd136c12fd9cffa7a85f2"
+checksum = "4e6d026e4576b49c6cebbfd26c09d494452820d5794e57583d604f657b146595"
 dependencies = [
  "smallvec",
 ]
 
 [[package]]
 name = "rten-vecmath"
-version = "0.14.1"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1a5fd718507ec51e7ecdf050a19fa02afecfcdbb7e03f0e75eb09a7607fb2cb"
+checksum = "74b929b6ab9102ecfb7bec50ca5ed7cb5613635cbbb641ea4098737b9ad9826d"
 dependencies = [
  "rten-simd",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 2ee81f5..6414303 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,6 @@ members = [
 ]
 
 [workspace.dependencies]
-rten = { version = "0.14.0" }
-rten-imageproc = { version = "0.14.0" }
-rten-tensor = { version = "0.14.0" }
+rten = { version = "0.15.0" }
+rten-imageproc = { version = "0.15.0" }
+rten-tensor = { version = "0.15.0" }
diff --git a/ocrs/src/lib.rs b/ocrs/src/lib.rs
index 6da27bf..6eedf47 100644
--- a/ocrs/src/lib.rs
+++ b/ocrs/src/lib.rs
@@ -310,10 +310,11 @@ mod tests {
                 Dimension::Fixed(200),
                 Dimension::Fixed(100),
             ]),
+            None,
         );
         gb.add_input(input_id);
 
-        let output_id = gb.add_value("output", None);
+        let output_id = gb.add_value("output", None, None);
         gb.add_output(output_id);
 
         let bias = Tensor::from_scalar(0.5);
@@ -353,11 +354,12 @@ mod tests {
                 Dimension::Fixed(output_columns),
                 Dimension::Symbolic("seq".to_string()),
             ]),
+            None,
         );
         gb.add_input(input_id);
 
         // MaxPool to scale width by 1/4: NCHW => NCHW/4
-        let pool_out = gb.add_value("max_pool_out", None);
+        let pool_out = gb.add_value("max_pool_out", None, None);
         gb.add_operator(
             "max_pool",
             OpType::MaxPool(MaxPool {
@@ -372,7 +374,7 @@ mod tests {
         // Squeeze to remove the channel dim: NCHW/4 => NHW/4
         let squeeze_axes = Tensor::from_vec(vec![1]);
         let squeeze_axes_id = gb.add_constant(squeeze_axes.view());
-        let squeeze_out = gb.add_value("squeeze_out", None);
+        let squeeze_out = gb.add_value("squeeze_out", None, None);
         gb.add_operator(
             "squeeze",
             OpType::Squeeze,
@@ -381,7 +383,7 @@ mod tests {
         );
 
         // Transpose: NHW/4 => W/4NH
-        let transpose_out = gb.add_value("transpose_out", None);
+        let transpose_out = gb.add_value("transpose_out", None, None);
         gb.add_operator(
             "transpose",
             OpType::Transpose(Transpose {