diff --git a/Dockerfile b/Dockerfile
index 1d22550..c012b9a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -182,7 +182,7 @@ RUN git clone https://git.kongjian.xin:8443/cartodb/cartodb-4.29.git cartodb &&
     cd cartodb && \
     # Install cartodb extension
     cd lib && \
-    git clone https://github.com/CartoDB/cartodb-postgresql sql && \
+    git clone https://github.com/CartoDB/cartodb-postgresql.git sql && \
     cd sql && \
     git checkout 667ec0e32c && \
     PGUSER=postgres make install && \