diff --git a/collector.go b/collector.go
index 01c6269..297daea 100644
--- a/collector.go
+++ b/collector.go
@@ -154,6 +154,7 @@ func (e *exporter) Collect(ch chan<- prometheus.Metric) {
 }
 
 func collectPerDatabaseGauge(stats *stats, vec *prometheus.GaugeVec, collectFunc func(*dbStats) []metricInfo, ch chan<- prometheus.Metric) {
+	vec.Reset()
 	for _, dbs := range stats.dbStats {
 		metricInfos := collectFunc(dbs)
 
@@ -165,6 +166,7 @@ func collectPerDatabaseGauge(stats *stats, vec *prometheus.GaugeVec, collectFunc
 }
 
 func collectPerDatabaseCounter(stats *stats, vec *prometheus.CounterVec, collectFunc func(*dbStats) []metricInfo, ch chan<- prometheus.Metric) {
+	vec.Reset()
 	for _, dbs := range stats.dbStats {
 		metricInfos := collectFunc(dbs)
 
diff --git a/readme.md b/readme.md
index cc7cdd0..9bde945 100644
--- a/readme.md
+++ b/readme.md
@@ -122,6 +122,10 @@ ravendb_working_set_bytes 1.651195904e+09
 
 ## Changelog
 
+### 0.5.1
+
+* Fixed issue with per database metric not properly resetting
+
 ### 0.5.0
 
 * Added database gauge metric: `ravendb_database_tasks`