diff --git a/Cargo.lock b/Cargo.lock
index ab96e00e..e72c7f2e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -333,7 +333,7 @@ dependencies = [
 [[package]]
 name = "egraph-serialize"
 version = "0.1.0"
-source = "git+https://github.com/egraphs-good/egraph-serialize?rev=9ce281291635b0e1e7685b488de67bb5a3fee3db#9ce281291635b0e1e7685b488de67bb5a3fee3db"
+source = "git+https://github.com/egraphs-good/egraph-serialize?rev=325f7c6b4b909752ee0f57f9619f698a52cc343e#325f7c6b4b909752ee0f57f9619f698a52cc343e"
 dependencies = [
  "graphviz-rust",
  "indexmap",
diff --git a/Cargo.toml b/Cargo.toml
index 6a9e397f..cb8838a3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -37,7 +37,7 @@ smallvec = "1.11"
 
 generic_symbolic_expressions = "5.0.4"
 
-egraph-serialize = { git = "https://github.com/egraphs-good/egraph-serialize", rev = "9ce281291635b0e1e7685b488de67bb5a3fee3db", features = [
+egraph-serialize = { git = "https://github.com/egraphs-good/egraph-serialize", rev = "325f7c6b4b909752ee0f57f9619f698a52cc343e", features = [
   "serde",
   "graphviz",
 ] }
diff --git a/src/serialize.rs b/src/serialize.rs
index 9b56a38d..4746e2ed 100644
--- a/src/serialize.rs
+++ b/src/serialize.rs
@@ -2,7 +2,7 @@ use ordered_float::NotNan;
 use std::collections::VecDeque;
 use symbol_table::GlobalSymbol;
 
-use crate::{ast::ResolvedFunctionDecl, util::HashMap, EGraph, Value};
+use crate::{ast::ResolvedFunctionDecl, util::HashMap, EGraph, TupleOutput, Value};
 
 pub struct SerializeConfig {
     // Maximumum number of functions to include in the serialized graph, any after this will be discarded
@@ -87,7 +87,7 @@ impl EGraph {
         let all_calls: Vec<(
             &ResolvedFunctionDecl,
             &[Value],
-            &Value,
+            &TupleOutput,
             egraph_serialize::ClassId,
             egraph_serialize::NodeId,
         )> = self
@@ -103,7 +103,7 @@ impl EGraph {
                         (
                             &function.decl,
                             input,
-                            &output.value,
+                            output,
                             self.value_to_class_id(&output.value),
                             self.to_node_id(SerializedNode::Function {
                                 name: *name,
@@ -126,7 +126,11 @@ impl EGraph {
         let mut node_ids: NodeIDs = all_calls.iter().fold(
             HashMap::default(),
             |mut acc, (_decl, _input, output, class_id, node_id)| {
-                if self.get_sort_from_value(output).unwrap().is_eq_sort() {
+                if self
+                    .get_sort_from_value(&output.value)
+                    .unwrap()
+                    .is_eq_sort()
+                {
                     acc.entry(class_id.clone())
                         .or_insert_with(VecDeque::new)
                         .push_back(node_id.clone());
@@ -137,7 +141,8 @@ impl EGraph {
 
         let mut egraph = egraph_serialize::EGraph::default();
         for (decl, input, output, class_id, node_id) in all_calls {
-            self.serialize_value(&mut egraph, &mut node_ids, output, &class_id);
+            self.serialize_value(&mut egraph, &mut node_ids, &output.value, &class_id);
+
             let children: Vec<_> = input
                 .iter()
                 .map(|v| {
@@ -151,6 +156,9 @@ impl EGraph {
                     eclass: class_id.clone(),
                     cost: NotNan::new(decl.cost.unwrap_or(1) as f64).unwrap(),
                     children,
+                    data: egraph_serialize::NodeData {
+                        subsumed: output.subsumed,
+                    },
                 },
             );
         }
@@ -256,6 +264,7 @@ impl EGraph {
                         eclass: class_id.clone(),
                         cost: NotNan::new(f64::INFINITY).unwrap(),
                         children: vec![],
+                        data: egraph_serialize::NodeData { subsumed: false },
                     },
                 );
                 VecDeque::from(vec![node_id])
@@ -287,6 +296,8 @@ impl EGraph {
                         eclass: class_id.clone(),
                         cost: NotNan::new(1.0).unwrap(),
                         children,
+                        // primitives can never be subsumed
+                        data: egraph_serialize::NodeData { subsumed: false },
                     },
                 );
             };
diff --git a/tests/integration_test.rs b/tests/integration_test.rs
index 7cc6b24c..f3e9f982 100644
--- a/tests/integration_test.rs
+++ b/tests/integration_test.rs
@@ -1,4 +1,6 @@
-use egglog::{ast::Expr, EGraph, ExtractReport, Function, SerializeConfig, Term, Value};
+use egglog::{
+    ast::Expr, sort::EqSort, EGraph, ExtractReport, Function, SerializeConfig, Term, Value,
+};
 use symbol_table::GlobalSymbol;
 
 #[test]
@@ -406,3 +408,34 @@ fn test_value_to_classid() {
     assert!(serialized.class_data.get(&class_id).is_some());
     assert_eq!(value, egraph.class_id_to_value(&class_id));
 }
+
+#[test]
+fn test_serialize_subsume_status() {
+    let mut egraph = EGraph::default();
+
+    egraph
+        .parse_and_run_program(
+            None,
+            r#"
+            (datatype Math)
+            (function a () Math )
+            (function b () Math )
+            (a)
+            (b)
+            (subsume (a))
+            "#,
+        )
+        .unwrap();
+
+    let serialized = egraph.serialize(SerializeConfig::default());
+    let a_id = egraph.to_node_id(egglog::SerializedNode::Function {
+        name: ("a").into(),
+        offset: 0,
+    });
+    let b_id = egraph.to_node_id(egglog::SerializedNode::Function {
+        name: "b".into(),
+        offset: 0,
+    });
+    assert!(serialized.nodes[&a_id].data.subsumed);
+    assert!(!serialized.nodes[&b_id].data.subsumed);
+}