diff --git a/roles/connect/vars/main.yml b/roles/connect/vars/main.yml
index df2245f..28796b5 100644
--- a/roles/connect/vars/main.yml
+++ b/roles/connect/vars/main.yml
@@ -78,7 +78,7 @@ connect_environment: [
   "PROCESS_SEARCH_MODULE: \"{{ connect_process_search_module }}\"",
 
   "ELASTIC_HOST: \"{{ connect_elastic_host | default('') }}\"",
-  "ELASTIC_PREFIX: \"{{ connect_elastic_prefix }}\"",
+  "ELASTIC_PREFIX: \"{{ connect_elastic_prefix | replace('-','_') }}\"",
   "ELASTIC_USERNAME: \"{{ connect_elastic_username | default('') }}\"",
   "ELASTIC_PASSWORD:  \"{{ connect_elastic_password | default('') }}\"",
   "ELASTIC_CA:  \"{{ connect_elastic_ca | default('') }}\"",