diff --git a/Dockerfile b/Dockerfile
index 738cf1b0..6919cb28 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -23,6 +23,7 @@ ENV IROOT=/install
 ENV DROGON_ROOT=$IROOT/drogon
 
 WORKDIR $IROOT
+ADD https://api.github.com/repos/an-tao/drogon/git/refs/heads/master version.json
 RUN git clone https://github.com/an-tao/drogon
 
 WORKDIR $DROGON_ROOT
diff --git a/trantor b/trantor
index e92f3fd0..0e10ddfd 160000
--- a/trantor
+++ b/trantor
@@ -1 +1 @@
-Subproject commit e92f3fd0976cb67597688f74559889cd19b5f2e3
+Subproject commit 0e10ddfd44726de4d83dc37c0a77c129d6ce1aad