diff --git a/Cargo.toml b/Cargo.toml
index dbd6743..ad8b858 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -15,4 +15,4 @@ version = "0.2.3"
 [workspace.dependencies]
 substrait-expr-funcgen = { path = "./substrait-expr-funcgen", version = "0.2.1" }
 substrait-expr-macros = { path = "./substrait-expr-macros", version = "0.2.1" }
-substrait = { version = "0.50.4" }
+substrait = { version = "0.62.0" }
diff --git a/substrait-expr-funcgen/src/lib.rs b/substrait-expr-funcgen/src/lib.rs
index 20c6dd8..17069da 100644
--- a/substrait-expr-funcgen/src/lib.rs
+++ b/substrait-expr-funcgen/src/lib.rs
@@ -54,8 +54,8 @@ fn generate_type(fn_name: &str, type_name: &str) -> Option<TokenStream> {
 
 fn generate_arg_type(fn_name: &str, typ: &Type) -> Option<TokenStream> {
     let type_name = match typ {
-        Type::Variant0(type_str) => type_str.as_str(),
-        Type::Variant1(_) => "",
+        Type::String(type_str) => type_str.as_str(),
+        Type::Object(_) => "",
     };
     if type_name.is_empty() {
         return None;
@@ -70,8 +70,8 @@ fn generate_arg_type(fn_name: &str, typ: &Type) -> Option<TokenStream> {
 
 fn generate_arg_return(fn_name: &str, typ: &Type) -> Option<TokenStream> {
     let type_name = match typ {
-        Type::Variant0(type_str) => type_str.as_str(),
-        Type::Variant1(_) => "",
+        Type::String(type_str) => type_str.as_str(),
+        Type::Object(_) => "",
     };
     if type_name.is_empty() {
         return None;
@@ -196,9 +196,9 @@ fn generate_ext_impls(function: &ScalarFunction) -> Result<Vec<(TokenStream, Tok
                         .unwrap()
                 })
                 .collect::<Vec<_>>();
-            let prototype = quote!(fn #fn_name_token(&self, #(#arg_name_tokens: Expression),*) -> FunctionBuilder;);
+            let prototype = quote!(fn #fn_name_token(&self, #(#arg_name_tokens: Expression),*) -> FunctionBuilder<'_>;);
             let imp = quote!(
-                fn #fn_name_token(&self, #(#arg_name_tokens: Expression),*) -> FunctionBuilder {
+                fn #fn_name_token(&self, #(#arg_name_tokens: Expression),*) -> FunctionBuilder<'_> {
                     self.new_builder(&#func_name_caps, vec![#(#arg_name_tokens),*])
                 }
             );
@@ -224,7 +224,7 @@ fn generate_function_blocks(
     let prototypes_impls = extensions
         .scalar_functions
         .iter()
-        .map(|func| generate_ext_impls(func))
+        .map(generate_ext_impls)
         .flat_map(|impls| match impls {
             Ok(impls) => impls.into_iter().map(Ok).collect(),
             Err(err) => vec![Err(err)],
@@ -262,7 +262,7 @@ pub fn generate_functions_for_yaml(uri: &str, filepath: &str) -> Result<TokenStr
         .to_str()
         .unwrap();
 
-    let func_blocks = generate_function_blocks(uri, &mod_name, extensions)?;
+    let func_blocks = generate_function_blocks(uri, mod_name, extensions)?;
 
     let mod_name_token: TokenStream = mod_name.parse()?;
 
@@ -299,7 +299,7 @@ impl Options {
 pub fn generate_functions(entries: &[(&str, &str)], options: Options) -> Result<()> {
     let yaml_modules = entries
         .iter()
-        .map(|entry| generate_functions_for_yaml(entry.0, &entry.1))
+        .map(|entry| generate_functions_for_yaml(entry.0, entry.1))
         .collect::<Result<Vec<_>>>()?;
     let crate_name_token: TokenStream = options.get_crate_name().parse()?;
 
diff --git a/substrait-expr-macros/src/lib.rs b/substrait-expr-macros/src/lib.rs
index 05124fd..6fa3d07 100644
--- a/substrait-expr-macros/src/lib.rs
+++ b/substrait-expr-macros/src/lib.rs
@@ -40,7 +40,7 @@ fn rust_to_names_fields(schema: &NestedType) -> proc_macro2::TokenStream {
     let parsed_fields = schema
         .fields
         .iter()
-        .map(|field| rust_field_to_names_field(field))
+        .map(rust_field_to_names_field)
         .collect::<Vec<_>>();
     quote! {vec![#(#parsed_fields),*]}
 }
diff --git a/substrait-expr/Cargo.toml b/substrait-expr/Cargo.toml
index 105ceae..8cdd265 100644
--- a/substrait-expr/Cargo.toml
+++ b/substrait-expr/Cargo.toml
@@ -21,7 +21,7 @@ include = [
 substrait.workspace = true
 substrait-expr-macros.workspace = true
 once_cell = "1.19.0"
-prost = "0.13.3"
+prost = "0.14.1"
 thiserror = "2.0.3"
 
 [build-dependencies]
diff --git a/substrait-expr/src/builder.rs b/substrait-expr/src/builder.rs
index bcc4166..0c787ab 100644
--- a/substrait-expr/src/builder.rs
+++ b/substrait-expr/src/builder.rs
@@ -205,21 +205,13 @@ pub mod functions;
 pub mod schema;
 pub mod types;
 
+#[derive(Default)]
 pub struct BuilderParams {
     pub allow_late_name_lookup: bool,
     pub allow_loose_types: bool,
     pub allow_unknown_types: bool,
 }
 
-impl Default for BuilderParams {
-    fn default() -> Self {
-        Self {
-            allow_late_name_lookup: false,
-            allow_loose_types: false,
-            allow_unknown_types: false,
-        }
-    }
-}
 
 impl BuilderParams {
     pub fn new_loose() -> Self {
@@ -269,7 +261,7 @@ pub trait IntoExprOutputNames {
     fn into_names(self) -> Vec<String>;
 }
 
-impl<'a> IntoExprOutputNames for &'a str {
+impl IntoExprOutputNames for &str {
     fn into_names(self) -> Vec<String> {
         vec![self.to_string()]
     }
@@ -296,11 +288,11 @@ impl ExpressionsBuilder {
         }
     }
 
-    pub fn fields(&self) -> RefBuilder {
+    pub fn fields(&self) -> RefBuilder<'_> {
         RefBuilder::new(&self.schema, &self.params, self.functions())
     }
 
-    pub fn functions(&self) -> FunctionsBuilder {
+    pub fn functions(&self) -> FunctionsBuilder<'_> {
         FunctionsBuilder::new(&self.schema)
     }
 
@@ -319,7 +311,7 @@ impl ExpressionsBuilder {
     }
 
     pub fn build(self) -> ExtendedExpression {
-        let (extension_uris, extensions) = self.schema.extensions_registry().to_substrait();
+        let (extension_uris, extension_urns, extensions) = self.schema.extensions_registry().to_substrait();
         let referred_expr = self
             .expressions
             .into_inner()
@@ -329,9 +321,11 @@ impl ExpressionsBuilder {
                 expr_type: Some(ExprType::Expression(named_expr.expr)),
             })
             .collect::<Vec<_>>();
+        #[expect(deprecated)]
         ExtendedExpression {
             version: Some(substrait::version::version_with_producer("substrait-expr")),
             extension_uris,
+            extension_urns,
             extensions,
             advanced_extensions: None,
             expected_type_urls: Vec::new(),
diff --git a/substrait-expr/src/builder/functions.rs b/substrait-expr/src/builder/functions.rs
index b8f6d9d..6858511 100644
--- a/substrait-expr/src/builder/functions.rs
+++ b/substrait-expr/src/builder/functions.rs
@@ -185,9 +185,9 @@ impl FunctionDefinition {
 /// See [`lookup_field_by_name`](crate::builder::functions::FunctionsBuilder::lookup_field_by_name)
 ///
 /// This is very likely to change when Substrait formally adopts a late lookup feature
-pub const LOOKUP_BY_NAME_FUNC_URI: &'static str = "https://substrait.io/functions";
+pub const LOOKUP_BY_NAME_FUNC_URI: &str = "https://substrait.io/functions";
 /// The name of the special function we use to indicate a late lookup
-pub const LOOKUP_BY_NAME_FUNC_NAME: &'static str = "lookup_by_name";
+pub const LOOKUP_BY_NAME_FUNC_NAME: &str = "lookup_by_name";
 
 /// A builder that can create scalar function expressions
 pub struct FunctionsBuilder<'a> {
@@ -210,10 +210,10 @@ impl<'a> FunctionsBuilder<'a> {
         &self,
         func: &'static FunctionDefinition,
         args: Vec<Expression>,
-    ) -> FunctionBuilder {
+    ) -> FunctionBuilder<'_> {
         let func_reference = self.schema.extensions_registry().register_function(func);
         FunctionBuilder {
-            func: func,
+            func,
             func_reference,
             args,
             options: BTreeMap::new(),
@@ -312,7 +312,7 @@ impl<'a> FunctionBuilder<'a> {
             // TODO: This is a hack.  We need to find which input argument to base the return type on
             // by matching the template names (e.g. if it is foo<T1,T2>(T1,T2) => T2 then this would
             // do the wrong thing)
-            FunctionReturn::Templated(_) => self.args.first().unwrap().output_type(&self.schema)?,
+            FunctionReturn::Templated(_) => self.args.first().unwrap().output_type(self.schema)?,
         };
 
         Ok(Expression {
diff --git a/substrait-expr/src/builder/schema.rs b/substrait-expr/src/builder/schema.rs
index aa512af..b72d1ed 100644
--- a/substrait-expr/src/builder/schema.rs
+++ b/substrait-expr/src/builder/schema.rs
@@ -90,6 +90,12 @@ pub struct TypesOnlySchemaBuilder {
     registry: ExtensionsRegistry,
 }
 
+impl Default for TypesOnlySchemaBuilder {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl TypesOnlySchemaBuilder {
     /// Create a new builder
     pub fn new() -> Self {
@@ -153,7 +159,7 @@ impl TypesOnlySchemaBuilder {
     }
 
     /// Create a type builder to create user defined types
-    pub fn types(&self) -> TypeBuilder {
+    pub fn types(&self) -> TypeBuilder<'_> {
         TypeBuilder {
             registry: &self.registry,
         }
@@ -166,6 +172,12 @@ pub struct NamesOnlySchemaNodeBuilder {
     registry: ExtensionsRegistry,
 }
 
+impl Default for NamesOnlySchemaNodeBuilder {
+    fn default() -> Self {
+        Self::new()
+    }
+}
+
 impl NamesOnlySchemaNodeBuilder {
     /// Create a new builder
     pub fn new() -> Self {
diff --git a/substrait-expr/src/helpers/literals.rs b/substrait-expr/src/helpers/literals.rs
index a211497..0fc0dff 100644
--- a/substrait-expr/src/helpers/literals.rs
+++ b/substrait-expr/src/helpers/literals.rs
@@ -116,7 +116,7 @@ impl LiteralInference for i32 {
 
 impl LiteralInference for i64 {
     fn to_substrait(self) -> LiteralType {
-        LiteralType::I64(self as i64)
+        LiteralType::I64(self)
     }
     fn try_from_substrait(lit: &LiteralType) -> Result<Self> {
         match lit {
@@ -261,7 +261,7 @@ pub mod literals {
         } else {
             Ok(make_literal(
                 LiteralType::VarChar(VarChar {
-                    value: value.into(),
+                    value,
                     length,
                 }),
                 false,
diff --git a/substrait-expr/src/helpers/registry.rs b/substrait-expr/src/helpers/registry.rs
index d3d4256..f591ed7 100644
--- a/substrait-expr/src/helpers/registry.rs
+++ b/substrait-expr/src/helpers/registry.rs
@@ -2,7 +2,7 @@ use std::{collections::BTreeMap, sync::RwLock};
 
 use substrait::proto::extensions::{
     simple_extension_declaration::{ExtensionFunction, ExtensionType, MappingType},
-    SimpleExtensionDeclaration, SimpleExtensionUri,
+    SimpleExtensionDeclaration, SimpleExtensionUri, SimpleExtensionUrn,
 };
 
 use crate::builder::functions::FunctionDefinition;
@@ -56,14 +56,22 @@ impl UriLookup {
         })
     }
 
-    pub fn to_substrait(self) -> Vec<SimpleExtensionUri> {
-        self.uris
-            .into_iter()
+    pub fn to_substrait(self) -> (Vec<SimpleExtensionUri>, Vec<SimpleExtensionUrn>) {
+        let uris = self.uris
+            .iter()
             .map(|entry| SimpleExtensionUri {
-                extension_uri_anchor: entry.1,
-                uri: entry.0,
+                extension_uri_anchor: *entry.1,
+                uri: entry.0.clone(),
+            })
+            .collect::<Vec<_>>();
+        let urns = self.uris
+            .into_iter()
+            .map(|entry| SimpleExtensionUrn {
+                extension_urn_anchor: entry.1,
+                urn: entry.0,
             })
-            .collect::<Vec<_>>()
+            .collect::<Vec<_>>();
+        (uris, urns)
     }
 }
 
@@ -101,7 +109,7 @@ impl RegistryInternal {
                 let anchor = self.counter;
                 self.counter += 1;
                 let type_record = TypeRecord {
-                    uri: uri,
+                    uri,
                     name: name.to_string(),
                     anchor,
                 };
@@ -121,7 +129,7 @@ impl RegistryInternal {
                 let function_record = FunctionRecord {
                     uri: uri.to_string(),
                     name: name.to_string(),
-                    anchor: anchor,
+                    anchor,
                 };
                 self.functions_inverse
                     .insert(anchor, function_record.clone());
@@ -213,9 +221,11 @@ impl ExtensionsRegistry {
     ) {
         for record in internal.types.values() {
             let uri_ref = uris.register(record.uri.clone());
+            #[expect(deprecated)]
             let declaration = SimpleExtensionDeclaration {
                 mapping_type: Some(MappingType::ExtensionType(ExtensionType {
                     extension_uri_reference: uri_ref,
+                    extension_urn_reference: uri_ref,
                     type_anchor: record.anchor,
                     name: record.name.clone(),
                 })),
@@ -232,9 +242,11 @@ impl ExtensionsRegistry {
     ) {
         for record in internal.functions.values() {
             let uri_ref = uris.register(record.uri.clone());
+            #[expect(deprecated)]
             let declaration = SimpleExtensionDeclaration {
                 mapping_type: Some(MappingType::ExtensionFunction(ExtensionFunction {
                     extension_uri_reference: uri_ref,
+                    extension_urn_reference: uri_ref,
                     function_anchor: record.anchor,
                     name: record.name.clone(),
                 })),
@@ -246,7 +258,7 @@ impl ExtensionsRegistry {
     /// Creates a substrait representation of the extensions registry
     ///
     /// This is typically placed in a top-level message such as ExtendedExpression or Plan
-    pub fn to_substrait(&self) -> (Vec<SimpleExtensionUri>, Vec<SimpleExtensionDeclaration>) {
+    pub fn to_substrait(&self) -> (Vec<SimpleExtensionUri>, Vec<SimpleExtensionUrn>, Vec<SimpleExtensionDeclaration>) {
         let mut uris = UriLookup::new();
         let mut extensions: Vec<SimpleExtensionDeclaration> = Vec::new();
         let internal = self.internal.read().unwrap();
@@ -254,8 +266,8 @@ impl ExtensionsRegistry {
         self.add_types(&internal, &mut uris, &mut extensions);
         self.add_functions(&internal, &mut uris, &mut extensions);
 
-        let uris = uris.to_substrait();
+        let (uris, urns) = uris.to_substrait();
 
-        (uris, extensions)
+        (uris, urns, extensions)
     }
 }
diff --git a/substrait-expr/src/helpers/schema.rs b/substrait-expr/src/helpers/schema.rs
index 83a9196..2899e63 100644
--- a/substrait-expr/src/helpers/schema.rs
+++ b/substrait-expr/src/helpers/schema.rs
@@ -276,7 +276,7 @@ impl SchemaInfo {
     /// Returns an iterator through the names of the fields, in DFS order
     ///
     /// Returns an error if the schema does not know the names of its fields
-    pub fn names_dfs<'a>(&'a self) -> Result<Box<dyn Iterator<Item = &str> + 'a>> {
+    pub fn names_dfs<'a>(&'a self) -> Result<Box<dyn Iterator<Item = &'a str> + 'a>> {
         match self {
             SchemaInfo::Empty(_) => Err(SubstraitExprError::invalid_input(
                 "Attempt to access field names when the schema is not name-aware",
diff --git a/substrait-expr/src/helpers/types.rs b/substrait-expr/src/helpers/types.rs
index b3257f7..b3a3c57 100644
--- a/substrait-expr/src/helpers/types.rs
+++ b/substrait-expr/src/helpers/types.rs
@@ -255,8 +255,8 @@ pub fn struct_(nullable: bool, children: Vec<Type>) -> Type {
     }
 }
 /// The URI of the unknown type
-pub const UNKNOWN_TYPE_URI: &'static str = "https://substrait.io/types";
+pub const UNKNOWN_TYPE_URI: &str = "https://substrait.io/types";
 /// The name of the unknown type
-pub const UNKNOWN_TYPE_NAME: &'static str = "unknown";
+pub const UNKNOWN_TYPE_NAME: &str = "unknown";
 /// A friendly name that indicates there is no type variation being used
 pub const NO_VARIATION: u32 = 0;
diff --git a/substrait-expr/src/util.rs b/substrait-expr/src/util.rs
index 7d6b9c5..bf82e25 100644
--- a/substrait-expr/src/util.rs
+++ b/substrait-expr/src/util.rs
@@ -1,24 +1,5 @@
 use crate::error::{Result, SubstraitExprError};
 
-/// Helper trait for extracting a property that should always be present
-/// from a protobuf message and returning an error if it is not
-pub(crate) trait HasRequiredProperties<T> {
-    fn into_required(self, prop_name: &str) -> Result<T>;
-}
-
-impl<T> HasRequiredProperties<T> for Option<T> {
-    // TODO: Is there any better way to do this that doesn't require specifying prop_name?
-    // Maybe a macro of some kind?
-    fn into_required(self, prop_name: &str) -> Result<T> {
-        self.ok_or_else(|| {
-            SubstraitExprError::InvalidSubstrait(format!(
-                "The required property {} is missing",
-                prop_name
-            ))
-        })
-    }
-}
-
 /// Helper trait for extracting a property that should always be present
 /// from a protobuf message and returning an error if it is not
 pub(crate) trait HasRequiredPropertiesRef<T> {
diff --git a/substrait-expr/substrait b/substrait-expr/substrait
index 5c8fa04..4c35318 160000
--- a/substrait-expr/substrait
+++ b/substrait-expr/substrait
@@ -1 +1 @@
-Subproject commit 5c8fa047993835b2bba60b196af0855316e5efdb
+Subproject commit 4c35318727c36d6e49779c06daf9f4ced722fe43