diff --git a/lib/forgejo-stack.ts b/lib/forgejo-stack.ts
index 9cb669f..67b0aeb 100644
--- a/lib/forgejo-stack.ts
+++ b/lib/forgejo-stack.ts
@@ -15,8 +15,11 @@ export class ForgejoStack extends cdk.Stack {
       vpcId: "vpc-0d3d4b67bd0cf8a68",
     });
 
-    const privateSubnet1 = ec2.Subnet.fromSubnetId(
-      this, "PrivateSubnet1", "subnet-04e38c507e96f1926"
+    const privateSubnet1 = ec2.Subnet.fromSubnetAttributes(
+      this, "PrivateSubnet1", {
+        subnetId: "subnet-04e38c507e96f1926",
+        availabilityZone: "us-east-1a",
+      }
     );
 
     const sg = new ec2.SecurityGroup(this, "SecurityGroup", {