diff --git a/app/ocache/metrics.go b/app/ocache/metrics.go
index b5fe9aa4..b520dff2 100644
--- a/app/ocache/metrics.go
+++ b/app/ocache/metrics.go
@@ -1,11 +1,18 @@
 package ocache
 
-import "github.com/prometheus/client_golang/prometheus"
+import (
+	"github.com/prometheus/client_golang/prometheus"
+	"strings"
+)
 
 func WithPrometheus(reg *prometheus.Registry, namespace, subsystem string) Option {
 	if subsystem == "" {
 		subsystem = "cache"
 	}
+	nameSplit := strings.Split(namespace, ".")
+	subSplit := strings.Split(subsystem, ".")
+	namespace = strings.Join(nameSplit, "_")
+	subsystem = strings.Join(subSplit, "_")
 	if reg == nil {
 		return nil
 	}
diff --git a/app/ocache/metrics_test.go b/app/ocache/metrics_test.go
new file mode 100644
index 00000000..e14d670d
--- /dev/null
+++ b/app/ocache/metrics_test.go
@@ -0,0 +1,19 @@
+package ocache
+
+import (
+	"context"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/stretchr/testify/require"
+	"strings"
+	"testing"
+)
+
+func TestWithPrometheus_MetricsConvertsDots(t *testing.T) {
+	opt := WithPrometheus(prometheus.NewRegistry(), "some.name", "some.system")
+	cache := New(func(ctx context.Context, id string) (value Object, err error) {
+		return &testObject{}, nil
+	}, opt).(*oCache)
+	_, err := cache.Get(context.Background(), "id")
+	require.NoError(t, err)
+	require.True(t, strings.Contains(cache.metrics.hit.Desc().String(), "some_name_some_system_hit"))
+}