diff --git a/companion.py b/companion.py
index 12e8044..3e14500 100644
--- a/companion.py
+++ b/companion.py
@@ -1,6 +1,10 @@
-from edmc import companion as c
-import platform
 import easygui
+from edmc import companion as c
+import os
+import platform
+
+if platform.system() == 'Windows':
+  os.environ['REQUESTS_CA_BUNDLE'] = "requests/cacert.pem"
 
 companion_session = c.Session()