diff --git a/config/default.yaml b/config/default.yaml
index 3a67f42..bffa267 100644
--- a/config/default.yaml
+++ b/config/default.yaml
@@ -101,11 +101,11 @@ healthCheck:
     ergWarnThreshold: 1000000000 # minimum recommended erg balance
     ergCriticalThreshold: 100000000 # minimum required erg balance
   ergoScanner:
-    warnDifference: 2 # warning difference between existing and scanned blocks height
-    criticalDifference: 10 # critical difference between existing and scanned blocks height
+    warnDifference: 5 # warning difference between existing and scanned blocks height
+    criticalDifference: 20 # critical difference between existing and scanned blocks height
   ergoNode:
     maxHeightDifference: 2 # maximum difference between header height and full height
-    maxBlockTime: 30 # maximum time to see  a new block in minutes
+    maxBlockTime: 30 # maximum time to see a new block in minutes
     minPeerCount: 10 # minimum recommended peers
     maxPeerHeightDifference: 2 # maximum difference between peers and our node
   cardanoScanner:
diff --git a/src/utils/healthCheck.ts b/src/utils/healthCheck.ts
index 1ad8a3e..d801c3f 100644
--- a/src/utils/healthCheck.ts
+++ b/src/utils/healthCheck.ts
@@ -74,7 +74,7 @@ class HealthCheckSingleton {
         notificationCheckConfig: {
           hasBeenUnstableForAWhile: {
             windowDuration:
-              getConfig().notification.hasBeenUnknownForAWhileWindowDuration,
+              getConfig().notification.hasBeenUnstableForAWhileWindowDuration,
           },
           hasBeenUnknownForAWhile: {
             windowDuration: