diff --git a/docker-compose.yml b/docker-compose.yml
index 0a10bad2..1b0642b1 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -264,6 +264,7 @@ services:
       MIRROR_KNOT_USE_SSL: "true"
       MIRROR_KNOT_SSRF: "true"
       MIRROR_RESYNC_PARALLELISM: "4"
+      MIRROR_APPVIEW_URL: http://appview:3000
       MIRROR_SEARCH_ZOEKT_URL: https://zoekt.tngl.boltless.dev/indexserver
     volumes:
       - knotmirror-data:/data
diff --git a/knotmirror/config/config.go b/knotmirror/config/config.go
index a3097b47..bc076292 100644
--- a/knotmirror/config/config.go
+++ b/knotmirror/config/config.go
@@ -8,6 +8,7 @@ import (
 )
 
 type Config struct {
+	AppviewUrl          string        `env:"MIRROR_APPVIEW_URL, default=https://tangled.org"`
 	PlcUrl              string        `env:"MIRROR_PLC_URL, default=https://plc.directory"`
 	TapUrl              string        `env:"MIRROR_TAP_URL, default=http://localhost:2480"`
 	DbUrl               string        `env:"MIRROR_DB_URL, required"`
diff --git a/knotmirror/repoindexer/language.go b/knotmirror/repoindexer/language.go
index 50bc0742..e5331399 100644
--- a/knotmirror/repoindexer/language.go
+++ b/knotmirror/repoindexer/language.go
@@ -8,6 +8,7 @@ import (
 	"fmt"
 	"io"
 	"log/slog"
+	"net/http"
 	"path/filepath"
 	"strings"
 	"time"
@@ -95,6 +96,30 @@ func NewBackgroundIndexScheduler(l *slog.Logger, cfg *config.Config, e *sql.DB,
 				return fmt.Errorf("failed to insert langs into db: %w", err)
 			}
 
+			// HACK(boltless): ping appview to update language cache.
+			go func() {
+				url := fmt.Sprintf("%s/%s", cfg.AppviewUrl, repoId.String())
+				pingCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
+				defer cancel()
+				req, err := http.NewRequestWithContext(pingCtx, http.MethodGet, url, nil)
+				if err != nil {
+					l.Warn("appview ping: build request failed", "err", err)
+					return
+				}
+				resp, err := http.DefaultClient.Do(req)
+				if err != nil {
+					l.Warn("appview ping failed", "url", url, "err", err)
+					return
+				}
+				defer resp.Body.Close()
+				// drain body to ensure the appview completes rendering
+				if _, err := io.Copy(io.Discard, resp.Body); err != nil {
+					l.Warn("appview ping: drain response failed", "url", url, "err", err)
+					return
+				}
+				l.Info("appview pinged", "url", url, "status", resp.StatusCode)
+			}()
+
 			return nil
 		},
 	)