diff --git a/src/database/database.js b/src/database/database.js
index 98d2343..da9334a 100644
--- a/src/database/database.js
+++ b/src/database/database.js
@@ -37,6 +37,13 @@ cacheLogger.level = config.server.logLevel;
 
 const CACHE_TTL_SECONDS = parseInt(config.database.redis.cacheTtl || '30', 10);
 
+const mergeObjectUpdates = (target, source) =>
+  _.mergeWith(target, source, (objValue, srcValue) => {
+    if (Array.isArray(objValue) || Array.isArray(srcValue)) {
+      return srcValue;
+    }
+  });
+
 export const retrieveObjectCache = async ({ model, id, populate = [] }) => {
   if (!model || !id) return undefined;
 
@@ -79,13 +86,13 @@ export const updateObjectCache = async ({ model, id, object, populate = [] }) =>
     for (const key of matchingKeys) {
       logger.trace('Updating object cache:', key);
       const cachedObject = (await redisServer.getKey(key)) || {};
-      const mergedObject = _.merge(cachedObject, object);
+      const mergedObject = mergeObjectUpdates(cachedObject, object);
       await redisServer.setKey(key, mergedObject, CACHE_TTL_SECONDS);
       mergedObjects.push(mergedObject);
     }
 
     const cacheObject = (await redisServer.getKey(cacheKey)) || {};
-    const mergedObject = _.merge(cacheObject, object);
+    const mergedObject = mergeObjectUpdates(cacheObject, object);
     await redisServer.setKey(cacheKey, mergedObject, CACHE_TTL_SECONDS);
 
     cacheLogger.trace('Updated object cache:', {