diff --git a/api/router.go b/api/router.go
index 49eccd9..7a6f829 100644
--- a/api/router.go
+++ b/api/router.go
@@ -12,6 +12,7 @@ package api
 import (
 	"encoding/json"
 	"net/http"
+	"time"
 
 	"dappco.re/go/proxy"
 )
@@ -139,7 +140,7 @@ func workersResponse(p *proxy.Proxy) any {
 			record.Rejected,
 			record.Invalid,
 			record.Hashes,
-			record.LastHashAt.Unix(),
+			unixOrZero(record.LastHashAt),
 			record.Hashrate(60),
 			record.Hashrate(600),
 			record.Hashrate(3600),
@@ -187,3 +188,10 @@ func upstreamRatio(now, total uint64) float64 {
 	}
 	return float64(now) / float64(total)
 }
+
+func unixOrZero(value time.Time) int64 {
+	if value.IsZero() {
+		return 0
+	}
+	return value.Unix()
+}
diff --git a/state_impl.go b/state_impl.go
index 271a4dc..f04c23c 100644
--- a/state_impl.go
+++ b/state_impl.go
@@ -585,7 +585,7 @@ func (p *Proxy) workersDocument() any {
 			record.Rejected,
 			record.Invalid,
 			record.Hashes,
-			record.LastHashAt.Unix(),
+			unixOrZero(record.LastHashAt),
 			record.Hashrate(60),
 			record.Hashrate(600),
 			record.Hashrate(3600),
@@ -629,6 +629,13 @@ func upstreamRatio(now uint64, upstreams UpstreamStats) float64 {
 	return float64(now) / float64(upstreams.Total)
 }
 
+func unixOrZero(value time.Time) int64 {
+	if value.IsZero() {
+		return 0
+	}
+	return value.Unix()
+}
+
 func NewMiner(conn net.Conn, localPort uint16, tlsCfg *tls.Config) *Miner {
 	if tlsCfg != nil {
 		if _, ok := conn.(*tls.Conn); !ok {