diff --git a/pkg/probod/notifications_config.go b/pkg/probod/notifications_config.go
index 14d790ba2..ac7e373db 100644
--- a/pkg/probod/notifications_config.go
+++ b/pkg/probod/notifications_config.go
@@ -22,4 +22,5 @@ type notificationsConfig struct {
 
 type webhookConfig struct {
 	SenderInterval int `json:"sender-interval"`
+	CacheTTL       int `json:"cache-ttl"`
 }
diff --git a/pkg/probod/probod.go b/pkg/probod/probod.go
index f9819f506..13a5a5b2b 100644
--- a/pkg/probod/probod.go
+++ b/pkg/probod/probod.go
@@ -157,6 +157,7 @@ func New() *Implm {
 				},
 				Webhook: webhookConfig{
 					SenderInterval: 5,
+					CacheTTL:       86400,
 				},
 			},
 			CustomDomains: customDomainsConfig{
@@ -486,6 +487,7 @@ func (impl *Implm) Run(
 	webhookSenderCtx, stopWebhookSender := context.WithCancel(context.Background())
 	webhookSender := webhook.NewSender(pgClient, l.Named("webhook-sender"), webhook.Config{
 		Interval:      time.Duration(impl.cfg.Notifications.Webhook.SenderInterval) * time.Second,
+		CacheTTL:      time.Duration(impl.cfg.Notifications.Webhook.CacheTTL) * time.Second,
 		EncryptionKey: impl.cfg.EncryptionKey,
 	})
 	wg.Go(
diff --git a/pkg/webhook/sender.go b/pkg/webhook/sender.go
index 908ff455b..0344c1084 100644
--- a/pkg/webhook/sender.go
+++ b/pkg/webhook/sender.go
@@ -39,13 +39,15 @@ import (
 
 type (
 	Sender struct {
-		pg            *pg.Client
-		logger        *log.Logger
-		httpClient    *http.Client
-		encryptionKey cipher.EncryptionKey
-		cache         sync.Map
-		interval      time.Duration
-		timeout       time.Duration
+		pg             *pg.Client
+		logger         *log.Logger
+		httpClient     *http.Client
+		encryptionKey  cipher.EncryptionKey
+		cache          sync.Map
+		cacheCreatedAt time.Time
+		cacheTTL       time.Duration
+		interval       time.Duration
+		timeout        time.Duration
 	}
 
 	cachedSecret struct {
@@ -56,6 +58,7 @@ type (
 	Config struct {
 		Interval      time.Duration
 		Timeout       time.Duration
+		CacheTTL      time.Duration
 		EncryptionKey cipher.EncryptionKey
 	}
 )
@@ -71,13 +74,19 @@ func NewSender(pg *pg.Client, logger *log.Logger, cfg Config) *Sender {
 		cfg.Timeout = 30 * time.Second
 	}
 
+	if cfg.CacheTTL <= 0 {
+		cfg.CacheTTL = 24 * time.Hour
+	}
+
 	return &Sender{
-		pg:            pg,
-		logger:        logger,
-		httpClient:    httpclient.DefaultPooledClient(httpclient.WithLogger(logger)),
-		encryptionKey: cfg.EncryptionKey,
-		interval:      cfg.Interval,
-		timeout:       cfg.Timeout,
+		pg:             pg,
+		logger:         logger,
+		httpClient:     httpclient.DefaultPooledClient(httpclient.WithLogger(logger)),
+		encryptionKey:  cfg.EncryptionKey,
+		cacheCreatedAt: time.Now(),
+		cacheTTL:       cfg.CacheTTL,
+		interval:       cfg.Interval,
+		timeout:        cfg.Timeout,
 	}
 }
 
@@ -95,6 +104,11 @@ func (s *Sender) Run(ctx context.Context) error {
 }
 
 func (s *Sender) processEvents(ctx context.Context) error {
+	if time.Since(s.cacheCreatedAt) >= s.cacheTTL {
+		s.cache = sync.Map{}
+		s.cacheCreatedAt = time.Now()
+	}
+
 	for {
 		webhookData, err := s.claimNextWebhookData(ctx)
 		if err != nil {