diff --git a/main.tf b/main.tf
index 3c753af9..acec358f 100644
--- a/main.tf
+++ b/main.tf
@@ -1,8 +1,10 @@
 locals {
   # next-tf config
-  config_dir           = trimsuffix(var.next_tf_dir, "/")
-  config_file          = jsondecode(file("${local.config_dir}/config.json"))
-  lambdas              = lookup(local.config_file, "lambdas", {})
+  config_dir  = trimsuffix(var.next_tf_dir, "/")
+  config_file = jsondecode(file("${local.config_dir}/config.json"))
+  lambdas = {
+    for k, v in lookup(local.config_file, "lambdas", {}) : replace(k, "/[^a-zA-Z0-9-_]/", "_") => v
+  }
   static_files_archive = "${local.config_dir}/${lookup(local.config_file, "staticFilesArchive", "")}"
 
   # Build the proxy config JSON