diff --git a/Dockerfile b/Dockerfile
index b5e93f2..1741904 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:20-alpine
+FROM node:24-alpine
 
 # Create app directory
 WORKDIR /app
diff --git a/tx/cs/cs-snomed.js b/tx/cs/cs-snomed.js
index 79774e0..c953dc8 100644
--- a/tx/cs/cs-snomed.js
+++ b/tx/cs/cs-snomed.js
@@ -1,4 +1,4 @@
-const { CodeSystemProvider, CodeSystemContentMode, Designation, CodeSystemFactoryProvider} = require('./cs-api');
+const { CodeSystemProvider, CodeSystemContentMode, CodeSystemFactoryProvider} = require('./cs-api');
 const {
   SnomedStrings, SnomedWords, SnomedStems, SnomedReferences,
   SnomedDescriptions, SnomedDescriptionIndex, SnomedConceptList,
@@ -9,6 +9,7 @@ const {
   SnomedExpressionServices, SnomedExpression, SnomedConcept,
   SnomedExpressionParser, NO_REFERENCE, SnomedServicesRenderOption
 } = require('../sct/expressions');
+const {DesignationUse} = require("../library/designations");
 
 // Context kinds matching Pascal enum
 const SnomedProviderContextKind = {
@@ -507,7 +508,7 @@ class SnomedProvider extends CodeSystemProvider {
     if (disp) return disp;
 
     if (ctxt.isComplex()) {
-      return this.sct.expressionServices.displayExpression(ctxt.expression);
+      return this.sct.expressionServices.renderExpression(ctxt.expression, SnomedServicesRenderOption.FillMissing);
     } else {
       return this.sct.getDisplayName(ctxt.getReference(), this.sct.defaultLanguage);
     }
@@ -558,7 +559,7 @@ class SnomedProvider extends CodeSystemProvider {
         // For complex expressions, just add the display
         const display = await this.display(context);
         if (display) {
-          displays.addDesignation(true, 'active', new Designation('en-US', null, display));
+          displays.addDesignation(true, 'active', 'en-US', DesignationUse.PREFERRED, display);
         }
       } else {
         // Get all designations for the concept
diff --git a/tx/workers/read.js b/tx/workers/read.js
index d17b845..342df1d 100644
--- a/tx/workers/read.js
+++ b/tx/workers/read.js
@@ -104,7 +104,7 @@ class ReadWorker extends TerminologyWorker {
           json.version = cs.version();
         }
         if (cs.iteratable()) {
-          json.content =  "conplete",
+          json.content =  "complete",
           json.concept = [];
           let csp = cs.build(this.opContext, []);
           let iter = await csp.iteratorAll();