diff --git a/src/gha_runner/clouddeployment.py b/src/gha_runner/clouddeployment.py
index 7f04c39..bca8139 100644
--- a/src/gha_runner/clouddeployment.py
+++ b/src/gha_runner/clouddeployment.py
@@ -161,7 +161,10 @@ def create_instances(self) -> dict[str, str]:
             raise ValueError(
                 "No region name provided, cannot create instances."
             )
-        ec2 = boto3.client("ec2", region_name=self.region_name)
+        if self.region_name is None:
+            ec2 = boto3.client("ec2")
+        else:
+            ec2 = boto3.client("ec2", region_name=self.region_name)
         id_dict = {}
         for token in self.gh_runner_tokens:
             label = GitHubInstance.generate_random_label()