diff --git a/package_linter.py b/package_linter.py
index b550f27..eafe6c7 100755
--- a/package_linter.py
+++ b/package_linter.py
@@ -67,7 +67,9 @@ def read_file(file_path):
 
 def check_source_management(app_path):
     print (c.BOLD + c.HEADER + "\n>>>> SOURCES MANAGEMENT <<<<" + c.END)
-    if os.path.exists(os.path.join(app_path, "sources")):
+    DIR = os.path.join(app_path, "sources")
+    # Check if there is more than six files on 'sources' folder
+    if len([name for name in os.listdir(DIR) if os.path.isfile(os.path.join(DIR, name))]) > 5:
         print_wrong("Upstream app sources shouldn't be stored on this 'sources' folder of this git repository as a copy/paste.\n" +
                 "At installation, the package should download sources from upstream via 'wget', git submodule or git subtree.\n" +
                 "See https://dev.yunohost.org/issues/201#Conclusion-chart")