diff --git a/docker/ubuntu/Dockerfile b/docker/ubuntu/Dockerfile
index 6c80238a1..4c82e1ecc 100644
--- a/docker/ubuntu/Dockerfile
+++ b/docker/ubuntu/Dockerfile
@@ -27,7 +27,7 @@ g++ -v
 # build parity
 RUN git clone https://github.com/ethcore/parity && \
         cd parity && \
-        git checkout master && \
+        git checkout beta && \
         git pull && \
         cargo build --release --verbose && \
         ls /build/parity/target/release/parity && \