diff --git a/cache.go b/cache.go
index d29c93d0..4e8e0dac 100644
--- a/cache.go
+++ b/cache.go
@@ -168,10 +168,16 @@ func NewCache[K Key, V any](config *Config[K, V]) (*Cache[K, V], error) {
 	switch {
 	case config.NumCounters == 0:
 		return nil, errors.New("NumCounters can't be zero")
+	case config.NumCounters < 0:
+		return nil, errors.New("NumCounters can't be negative number")
 	case config.MaxCost == 0:
 		return nil, errors.New("MaxCost can't be zero")
+	case config.MaxCost < 0:
+		return nil, errors.New("MaxCost can't be be negative number")
 	case config.BufferItems == 0:
 		return nil, errors.New("BufferItems can't be zero")
+	case config.BufferItems < 0:
+		return nil, errors.New("BufferItems can't be be negative number")
 	case config.TtlTickerDurationInSec == 0:
 		config.TtlTickerDurationInSec = bucketDurationSecs
 	}