diff --git a/tibanna/lambdas/run_task_awsem.py b/tibanna/lambdas/run_task_awsem.py
index 4b5eda8a..5ac3c143 100755
--- a/tibanna/lambdas/run_task_awsem.py
+++ b/tibanna/lambdas/run_task_awsem.py
@@ -8,7 +8,7 @@
     'function_handler': 'handler',
     'handler': 'service.handler',
     'region': AWS_REGION,
-    'runtime': 'python3.9',
+    'runtime': 'python3.11',
     'role': 'tibanna_lambda_init_role',
     'description': 'launch an ec2 instance',
     'timeout': 300,
diff --git a/tibanna/lambdas/update_cost_awsem.py b/tibanna/lambdas/update_cost_awsem.py
index d0c42e10..81ec69cd 100755
--- a/tibanna/lambdas/update_cost_awsem.py
+++ b/tibanna/lambdas/update_cost_awsem.py
@@ -8,7 +8,7 @@
     'function_handler': 'handler',
     'handler': 'service.handler',
     'region': AWS_REGION,
-    'runtime': 'python3.9',
+    'runtime': 'python3.11',
     'role': 'tibanna_lambda_init_role',
     'description': 'update costs of a workflow run',
     'timeout': 300,