diff --git a/lib/cocoapods-downloader/http.rb b/lib/cocoapods-downloader/http.rb
index 130d844..7ebabef 100644
--- a/lib/cocoapods-downloader/http.rb
+++ b/lib/cocoapods-downloader/http.rb
@@ -84,7 +84,7 @@ def filename_with_type(type=:zip)
       end
 
       def download_file(full_filename)
-        curl! %|-L -o #{full_filename.shellescape} #{url} --create-dirs|
+        curl! %|-L -o #{full_filename.shellescape} "#{url}" --create-dirs|
       end
 
       def extract_with_type(full_filename, type=:zip)