diff --git a/package-lock.json b/package-lock.json
index f60752e..62f968a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "flibusta",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "flibusta",
-      "version": "0.5.0",
+      "version": "0.5.1",
       "license": "MIT",
       "dependencies": {
         "axios": "1.2.6",
diff --git a/package.json b/package.json
index 313b778..70d7463 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "flibusta",
-  "version": "0.5.0",
+  "version": "0.5.1",
   "author": "ynhhoJ",
   "description": "Unofficial Flibusta API based on website search engine. If you like to read books - buy",
   "license": "MIT",
@@ -29,7 +29,7 @@
     "example-search-genres-paginated": "ts-node ./examples/searchGenresPaginated.ts",
     "test": "npm run test:specific 'tests/**/*.ts'",
     "test:specific": "npx nyc mocha --timeout 15000 --node-flags '--unhandled-rejections=strict' -r ts-node/register",
-    "build": "webpack && yarn copy-types",
+    "build": "webpack && npm run copy-types",
     "copy-types": "copyfiles -u 1 types/**/* build/types"
   },
   "dependencies": {
diff --git a/src/api/getBooksByAuthorOpds.ts b/src/api/getBooksByAuthorOpds.ts
index b080af6..b524abc 100644
--- a/src/api/getBooksByAuthorOpds.ts
+++ b/src/api/getBooksByAuthorOpds.ts
@@ -69,7 +69,12 @@ class GetBooksByAuthorOpds extends FlibustaAPIHelper {
       return undefined;
     }
 
-    const slicedEntryToLimit = entry.slice(0, limit);
+    let slicedEntryToLimit = entry;
+
+    if (Array.isArray(slicedEntryToLimit)) {
+      slicedEntryToLimit = slicedEntryToLimit.slice(0, limit);
+    }
+
     const items = this.prepareResponseFromOpdsEntry(slicedEntryToLimit);
     const pages = this.getCurrentOpdsPageInformation(feed, page);
 
diff --git a/src/api/getBooksByNameOpds.ts b/src/api/getBooksByNameOpds.ts
index 3c509fe..533a83e 100644
--- a/src/api/getBooksByNameOpds.ts
+++ b/src/api/getBooksByNameOpds.ts
@@ -94,7 +94,12 @@ class GetBooksByNameOpds extends FlibustaAPIHelper {
       return undefined;
     }
 
-    const slicedEntryToLimit = entry.slice(0, limit);
+    let slicedEntryToLimit = entry;
+
+    if (Array.isArray(slicedEntryToLimit)) {
+      slicedEntryToLimit = slicedEntryToLimit.slice(0, limit);
+    }
+
     const items = this.prepareResponseFromOpdsEntry(slicedEntryToLimit);
     const pages = this.getCurrentSearchOpdsPageInformation(feed);
     const totalCountItems = feed['os:totalResults'];