diff --git a/internal/app/app.go b/internal/app/app.go
index 93f72fd..bf9e6f2 100644
--- a/internal/app/app.go
+++ b/internal/app/app.go
@@ -7,6 +7,7 @@ package app
 
 import (
 	"flag"
+	"git.haefelfinger.net/piwigo/PiwigoDirectoryUploader/internal/pkg/category"
 	"git.haefelfinger.net/piwigo/PiwigoDirectoryUploader/internal/pkg/images"
 	"git.haefelfinger.net/piwigo/PiwigoDirectoryUploader/internal/pkg/localFileStructure"
 	"github.com/sirupsen/logrus"
@@ -39,12 +40,12 @@ func Run() {
 		logErrorAndExit(err, 3)
 	}
 
-	categories, err := getAllCategoriesFromServer(context.piwigo)
+	categories, err := category.GetAllCategoriesFromServer(context.piwigo)
 	if err != nil {
 		logErrorAndExit(err, 4)
 	}
 
-	err = synchronizeCategories(context.piwigo, filesystemNodes, categories)
+	err = category.SynchronizeCategories(context.piwigo, filesystemNodes, categories)
 	if err != nil {
 		logErrorAndExit(err, 5)
 	}
diff --git a/internal/app/category.go b/internal/pkg/category/category.go
similarity index 95%
rename from internal/app/category.go
rename to internal/pkg/category/category.go
index 3e95dad..e505379 100644
--- a/internal/app/category.go
+++ b/internal/pkg/category/category.go
@@ -3,7 +3,7 @@
  * This application is licensed under GPLv2. See the LICENSE file in the root directory of the project.
  */
 
-package app
+package category
 
 import (
 	"errors"
@@ -15,13 +15,13 @@ import (
 	"sort"
 )
 
-func getAllCategoriesFromServer(piwigoApi piwigo.PiwigoCategoryApi) (map[string]*piwigo.PiwigoCategory, error) {
+func GetAllCategoriesFromServer(piwigoApi piwigo.PiwigoCategoryApi) (map[string]*piwigo.PiwigoCategory, error) {
 	logrus.Debugln("Starting GetAllCategories")
 	categories, err := piwigoApi.GetAllCategories()
 	return categories, err
 }
 
-func synchronizeCategories(piwigoApi piwigo.PiwigoCategoryApi, filesystemNodes map[string]*localFileStructure.FilesystemNode, existingCategories map[string]*piwigo.PiwigoCategory) error {
+func SynchronizeCategories(piwigoApi piwigo.PiwigoCategoryApi, filesystemNodes map[string]*localFileStructure.FilesystemNode, existingCategories map[string]*piwigo.PiwigoCategory) error {
 	logrus.Infoln("Synchronizing categories...")
 
 	missingCategories := findMissingCategories(filesystemNodes, existingCategories)