diff --git a/lib/CodeService.js b/lib/CodeService.js
index cfa7d55..b2b11b4 100644
--- a/lib/CodeService.js
+++ b/lib/CodeService.js
@@ -93,9 +93,9 @@ class CodeService {
    * @param {string} umlsPassword - the UMLS password to use when downloading value sets (defaults to env "UMLS_PASSWORD")
    * @returns {Promise.<undefined,Error>} A promise that returns nothing when resolved and returns an error when rejected.
    */
-  ensureValueSetsInLibrary(library, checkIncluded = true, umlsUserName = env['UMLS_USER_NAME'], umlsPassword = env['UMLS_PASSWORD']) {
+  ensureValueSetsInLibrary(library, checkIncluded = true, umlsUserName = env['UMLS_USER_NAME'], umlsPassword = env['UMLS_PASSWORD'], caching = true) {
     const valueSets = extractSetOfValueSetsFromLibrary(library, checkIncluded);
-    return this.ensureValueSets(Array.from(valueSets), umlsUserName, umlsPassword);
+    return this.ensureValueSets(Array.from(valueSets), umlsUserName, umlsPassword, caching);
   }
 
   findValueSetsByOid(oid) {