diff --git a/http.go b/http.go
index 5a9d88b..062ab76 100644
--- a/http.go
+++ b/http.go
@@ -207,7 +207,7 @@ func (p *HTTPPool) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 		var out pb.SetRequest
 		err = proto.Unmarshal(b.Bytes(), &out)
 		if err != nil {
-			http.Error(w, err.Error(), http.StatusInternalServerError)
+			http.Error(w, err.Error(), http.StatusBadRequest)
 			return
 		}