diff --git a/packages/cloudformation/templates/givesource-custom.yml b/packages/cloudformation/templates/givesource-custom.yml
index cac50ce2..1e36a55a 100644
--- a/packages/cloudformation/templates/givesource-custom.yml
+++ b/packages/cloudformation/templates/givesource-custom.yml
@@ -767,7 +767,7 @@ Resources:
       FunctionName: GeneratePublicPagesHtml
       StackName: !Ref StackName
       Role: !Ref LambdaRoleArn
-      Runtime: "nodejs12.x"
+      Runtime: "nodejs10.x"
     DependsOn:
       - CreateLambdaEdgeFunction
       - LambdaEdgeRole
diff --git a/packages/lambda/src/custom/createLambdaEdgeFunction/index.js b/packages/lambda/src/custom/createLambdaEdgeFunction/index.js
index c7709d3f..cfa68dbc 100644
--- a/packages/lambda/src/custom/createLambdaEdgeFunction/index.js
+++ b/packages/lambda/src/custom/createLambdaEdgeFunction/index.js
@@ -31,7 +31,7 @@ exports.handle = (event, context, callback) => {
 	const functionName = process.env.AWS_STACK_NAME + '-' + event.ResourceProperties.FunctionName;
 	const region = 'us-east-1';
 	const role = event.ResourceProperties.Role;
-	const runtime = 'nodejs12.x';
+	const runtime = 'nodejs10.x';
 
 	if (event.RequestType === 'Delete') {
 		lambda.deleteFunction(region, event.PhysicalResourceId).then(() => {