diff --git a/terraform/main.tf b/terraform/main.tf
index c61af30..d7ad92f 100644
--- a/terraform/main.tf
+++ b/terraform/main.tf
@@ -66,9 +66,7 @@ resource "aws_lambda_function" "lambda_function" {
     memory_size = 128
     runtime = "python2.7"
     timeout = 5
-    # this will be released soon
-    # https://github.com/hashicorp/terraform/pull/5239
-    # source_code_hash = "${base64encode(sha256(file("lambda_function_payload.zip")))}"
+    source_code_hash = "${base64encode(sha256(file("lambda_function_payload.zip")))}"
 }
 
 resource "aws_lambda_permission" "allow_cloudwatch" {