diff --git a/app/common/enums.js b/app/common/enums.js
index a23a6a0..b7a650c 100644
--- a/app/common/enums.js
+++ b/app/common/enums.js
@@ -34,7 +34,6 @@ const CRAWLER_AD_TYPE = {
 
 module.exports = {
   AD_TYPE,
-  IGNORED_USERNAMES,
   AD_CATEGORY,
   AD_STATUS,
   AD_AGENCY,
diff --git a/app/crawler/crawlerConfig.js b/app/crawler/crawlerConfig.js
index 2b457bc..eb9133a 100644
--- a/app/crawler/crawlerConfig.js
+++ b/app/crawler/crawlerConfig.js
@@ -31,7 +31,8 @@ const OLX_CONFIG = {
     parseInt(process.env.OLX_MAX_RESULTS_PER_PAGE) || 50,
   OLX_CRAWLER_AD_TYPE: olxCrawlerAdType || CRAWLER_AD_TYPE.NONE,
   OLX_CRAWLER_AD_CATEGORIES: transformedCrawlerAdCategories,
-  OLX_IGNORED_USERNAMES: olxIgnoredUsernames || []
+  OLX_IGNORED_USERNAMES: olxIgnoredUsernames || [],
+  OLX_DELAY_BETWEEN_PAGES: parseInt(process.env.OLX_DELAY_BETWEEN_PAGES) || 1000
 };
 
 module.exports = {
diff --git a/development.env b/development.env
index e96b363..2f2fdc0 100644
--- a/development.env
+++ b/development.env
@@ -20,4 +20,5 @@ OLX_MAX_PAGES=Restrict crawler to this number of pages
 OLX_MAX_RESULTS_PER_PAGE=Only this number or less results from one page will be scraped and saved
 OLX_CRAWLER_AD_TYPE=enum name of what type of ads should be crawled, check common/enums.js file for valid values
 OLX_CRAWLER_AD_CATEGORIES=comma separated list of enum names of categories to be included, check common/enums.js file for valid values
-OLX_MAX_AGE=[in days] if ad is crawled before this number of days, it will be re-crawled
+OLX_IGNORED_USERNAMES=comma separated list of usernames to ignore
+OLX_DELAY_BETWEEN_PAGES=time in miliseconds to wait before indexing next page