diff --git a/vars-deployment.json b/vars-deployment.json
index 85f61d303b9f91c3396e705d1a5b154119e71dea..3d9417ed0cf04ac03ce55654cf4fb1dd514ee94d 100644
--- a/vars-deployment.json
+++ b/vars-deployment.json
@@ -4,7 +4,7 @@
      "description": "Environment of the deployment, contained in domains, subdomains and resources name convention, should match the project name.",
      "masked": false,
      "validation_regex_explanation": "Should contain letters only, between 3 and 20 characters long.",
-     "validation_regex": "^[a-zA-Z]{3,30}$" 
+     "validation_regex": "^[a-zA-Z]{3,20}$" 
     },
     {
      "name": "TF_VAR_INSTANCES_COUNT",