diff --git a/requirements.txt b/requirements.txt
index e77c4c83b..48997f8d2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -12,3 +12,4 @@ pillow
 pycurl
 docutils
 qrcode
+certifi
diff --git a/setup_win32.py b/setup_win32.py
index 681a2ac0a..42acba89e 100644
--- a/setup_win32.py
+++ b/setup_win32.py
@@ -118,7 +118,7 @@ OPTIONS = {
         'includes': ['gi', 'numbers', 'win32com.client', 'win32com.server'],
         'packages': ['gi', 'cffi', 'cryptography', 'google', 'axolotl',
                      'pkg_resources', 'Crypto', 'pycparser', 'keyring',
-                     'PIL', 'idna', 'qrcode'],
+                     'PIL', 'idna', 'qrcode', 'certifi'],
         'include_files': INCLUDE_FILES,
     }
 }