diff --git a/README.md b/README.md
index 0cea85c..eaffb1c 100644
--- a/README.md
+++ b/README.md
@@ -47,8 +47,8 @@ module "lambda" {
   }
 
   // Add environment variables.
-  environment {
-    variables {
+  environment = {
+    variables = {
       SLACK_URL = var.slack_url
     }
   }
diff --git a/lambda.tf b/lambda.tf
index 24f3101..2fdd510 100644
--- a/lambda.tf
+++ b/lambda.tf
@@ -47,4 +47,4 @@ resource "aws_lambda_function" "lambda" {
       subnet_ids         = vpc_config.value.subnet_ids
     }
   }
-}
\ No newline at end of file
+}