diff --git a/server/Dockerfile b/server/Dockerfile
index a59b77ce4204c5ea42484b6bfe2a2d2ab2453ea6..9be56c1b5df3923ceb5842c03bc6950f8566b635 100644
--- a/server/Dockerfile
+++ b/server/Dockerfile
@@ -97,7 +97,7 @@ RUN make install
 RUN ldconfig
 
 WORKDIR /source/seafile-server
-RUN git fetch && checkout da2d96a0
+RUN git fetch && git checkout da2d96a0
 RUN ./autogen.sh
 RUN ./configure --disable-fuse
 RUN make