diff --git a/vendor.conf b/vendor.conf
index 4882b37..3bb2cc4 100644
--- a/vendor.conf
+++ b/vendor.conf
@@ -26,7 +26,7 @@
 golang.org/x/sync                                   e225da77a7e68af35c70ccbf71af2b83e6acac3c
 
 # buildkit
-github.com/moby/buildkit                            ff93519eefb7d4b2ee67dd78166cd5d0f52f8980
+github.com/moby/buildkit                            928f3b480d7460aacb401f68610058ffdb549aca
 github.com/tonistiigi/fsutil                        3d2716dd0a4d06ff854241c7e8b6f3f904e1719f
 github.com/grpc-ecosystem/grpc-opentracing          8e809c8a86450a29b90dcc9efbf062d0fe6d9746
 github.com/opentracing/opentracing-go               1361b9cd60be79c4c3a7fa9841b3c132e40066a7
diff --git a/vendor/github.com/moby/buildkit/cache/refs.go b/vendor/github.com/moby/buildkit/cache/refs.go
index 046f3d8..3f9d282 100644
--- a/vendor/github.com/moby/buildkit/cache/refs.go
+++ b/vendor/github.com/moby/buildkit/cache/refs.go
@@ -185,7 +185,10 @@
 func (cr *cacheRecord) remove(ctx context.Context, removeSnapshot bool) error {
 	delete(cr.cm.records, cr.ID())
 	if cr.parent != nil {
-		if err := cr.parent.release(ctx); err != nil {
+		cr.parent.mu.Lock()
+		err := cr.parent.release(ctx)
+		cr.parent.mu.Unlock()
+		if err != nil {
 			return err
 		}
 	}
@@ -401,11 +404,6 @@
 				return err
 			}
 		}
-		if sr.parent != nil {
-			if err := sr.parent.release(ctx); err != nil {
-				return err
-			}
-		}
 		return sr.remove(ctx, true)
 	} else {
 		if sr.updateLastUsed() {