diff --git a/deploy/main.tf b/deploy/main.tf
index 53f6bc9..d072eb7 100644
--- a/deploy/main.tf
+++ b/deploy/main.tf
@@ -43,7 +43,7 @@ module "eks_terragrunt_repo_generator" {
   lambda_config = {
     image_uri   = "${data.aws_caller_identity.current.account_id}.dkr.ecr.${data.aws_region.current.name}.amazonaws.com/eks-terragrunt-repo-generator/lambda:${var.image_tag}"
     memory_size = 512
-    timeout     = 300
+    timeout     = 900 # must exceed CodeBuild poll window (12 min = 720s)
 
     # VPC configuration (required for GitHub Enterprise access)
     vpc_config = var.enable_vpc ? {