diff --git a/gcalcli/cli.py b/gcalcli/cli.py
index 7009fa1..3b957a3 100755
--- a/gcalcli/cli.py
+++ b/gcalcli/cli.py
@@ -20,12 +20,11 @@
 # Everything you need to know (Google API Calendar v3): http://goo.gl/HfTGQ #
 #                                                                           #
 # ######################################################################### #
-import truststore
-truststore.inject_into_ssl()
 from collections import namedtuple
 import os
 import signal
 import sys
+import truststore
 
 from . import utils
 from .argparsers import get_argument_parser, handle_unparsed
@@ -88,6 +87,8 @@ def run_add_prompt(parsed_args, printer):
 
 def main():
     parser = get_argument_parser()
+    # trust system certificate store for SSL verification
+    truststore.inject_into_ssl() 
     try:
         argv = sys.argv[1:]
         gcalclirc = os.path.expanduser('~/.gcalclirc')
diff --git a/pyproject.toml b/pyproject.toml
index 0d92eab..21375fc 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -26,13 +26,13 @@ classifiers = [
   "Programming Language :: Python :: 3",
 ]
 dependencies = [
-  "truststore",
-  "python-dateutil",
+  "argcomplete",
   "google-api-python-client>=1.4",
-  "httplib2",
   "google_auth_oauthlib",
+  "httplib2",
   "parsedatetime",
-  "argcomplete",
+  "python-dateutil",
+  "truststore",
   # dev dependencies
   "google-api-python-client-stubs",
   "types-python-dateutil",