diff --git a/client/src/components/Workflow/Editor/Index.vue b/client/src/components/Workflow/Editor/Index.vue
index 49e9033a1670..814cdc6c81d2 100644
--- a/client/src/components/Workflow/Editor/Index.vue
+++ b/client/src/components/Workflow/Editor/Index.vue
@@ -425,6 +425,7 @@ export default {
                     inputs: response.inputs,
                     outputs: response.outputs,
                     tool_state: response.tool_state,
+                    tool_version: response.tool_version,
                 });
             });
         },
@@ -550,6 +551,7 @@ export default {
                         outputs: data.outputs,
                         config_form: data.config_form,
                         tool_state: data.tool_state,
+                        tool_version: data.tool_version,
                         errors: data.errors,
                     };
                     this.onUpdateStep(step);
diff --git a/client/src/stores/workflowStepStore.ts b/client/src/stores/workflowStepStore.ts
index 93c96cb869df..81d4b15674cb 100644
--- a/client/src/stores/workflowStepStore.ts
+++ b/client/src/stores/workflowStepStore.ts
@@ -107,6 +107,7 @@ export interface NewStep {
     position?: StepPosition;
     post_job_actions?: PostJobActions;
     tool_state: Record<string, unknown>;
+    tool_version?: string;
     tooltip?: string;
     type: "tool" | "data_input" | "data_collection_input" | "subworkflow" | "parameter_input" | "pause";
     uuid?: string;
diff --git a/lib/galaxy/managers/workflows.py b/lib/galaxy/managers/workflows.py
index 1f1467d5b330..6106d0043517 100644
--- a/lib/galaxy/managers/workflows.py
+++ b/lib/galaxy/managers/workflows.py
@@ -1083,12 +1083,9 @@ def do_inputs(inputs, values, prefix, step, other_values=None):
                 step_dict["label"] = f"Unknown Tool with id '{e.tool_id}'"
                 step_dicts.append(step_dict)
                 continue
-            if step.type == "tool" or step.type is None:
-                tool = trans.app.toolbox.get_tool(step.tool_id)
-                if tool:
-                    step_dict["label"] = step.label or tool.name
-                else:
-                    step_dict["label"] = f"Unknown Tool with id '{step.tool_id}'"
+            if step.type == "tool":
+                tool = trans.app.toolbox.get_tool(step.tool_id, step.tool_version)
+                step_dict["label"] = step.label or tool.name
                 step_dict["inputs"] = do_inputs(tool.inputs, step.state.inputs, "", step)
             elif step.type == "subworkflow":
                 step_dict["label"] = step.label or (step.subworkflow.name if step.subworkflow else "Missing workflow.")
@@ -1166,6 +1163,8 @@ def _workflow_to_dict_editor(self, trans, stored, workflow, tooltip=True, is_sub
             input_connections_type = {}
             multiple_input = {}  # Boolean value indicating if this can be multiple
             if isinstance(module, ToolModule) and module.tool:
+                # Serialize tool version
+                step_dict["tool_version"] = module.tool.version
                 # Determine full (prefixed) names of valid input datasets
                 data_input_names = {}
 
diff --git a/lib/galaxy/webapps/galaxy/api/workflows.py b/lib/galaxy/webapps/galaxy/api/workflows.py
index 2523819056d8..90b07c7a802b 100644
--- a/lib/galaxy/webapps/galaxy/api/workflows.py
+++ b/lib/galaxy/webapps/galaxy/api/workflows.py
@@ -585,7 +585,7 @@ def build_module(self, trans: GalaxyWebTransaction, payload=None):
             module_state: Dict[str, Any] = {}
             populate_state(trans, module.get_inputs(), inputs, module_state, check=False)
             module.recover_state(module_state, from_tool_form=True)
-        return {
+        step_dict = {
             "name": module.get_name(),
             "tool_state": module.get_state(),
             "content_id": module.get_content_id(),
@@ -593,6 +593,9 @@ def build_module(self, trans: GalaxyWebTransaction, payload=None):
             "outputs": module.get_all_outputs(),
             "config_form": module.get_config_form(),
         }
+        if payload["type"] == "tool":
+            step_dict["tool_version"] = module.get_version()
+        return step_dict
 
     @expose_api
     def get_tool_predictions(self, trans: ProvidesUserContext, payload, **kwd):
diff --git a/lib/galaxy_test/selenium/test_workflow_editor.py b/lib/galaxy_test/selenium/test_workflow_editor.py
index 9d3edcbc79c4..55d1d5b8264a 100644
--- a/lib/galaxy_test/selenium/test_workflow_editor.py
+++ b/lib/galaxy_test/selenium/test_workflow_editor.py
@@ -500,6 +500,14 @@ def test_editor_tool_upgrade(self):
         self.assert_workflow_has_changes_and_save()
         workflow = self.workflow_populator.download_workflow(workflow_id)
         assert workflow["steps"]["0"]["tool_version"] == "0.2"
+        editor.node._(label="multiple_versions").wait_for_and_click()
+        editor.tool_version_button.wait_for_and_click()
+        assert self.select_dropdown_item("Switch to 0.1+galaxy6"), "Switch to tool version dropdown item not found"
+        self.screenshot("workflow_editor_version_downgrade")
+        self.sleep_for(self.wait_types.UX_RENDER)
+        self.assert_workflow_has_changes_and_save()
+        workflow = self.workflow_populator.download_workflow(workflow_id)
+        assert workflow["steps"]["0"]["tool_version"] == "0.1+galaxy6"
 
     @selenium_test
     def test_editor_tool_upgrade_message(self):