diff --git a/Ubuntu/Dockerfile b/Ubuntu/Dockerfile
index c40d1d4..9c7cac0 100644
--- a/Ubuntu/Dockerfile
+++ b/Ubuntu/Dockerfile
@@ -86,7 +86,7 @@ RUN git clone https://github.com/scipopt/scip \
 
 RUN git clone https://ceres-solver.googlesource.com/ceres-solver \
  && cd ceres-solver \
- && git submodule update --init --recursive \
+ && git checkout 2.2.0 \
  && mkdir build \
  && cd build \
  && cmake -DMINIGLOG=ON -DMINIGLOG_MAX_LOG_LEVEL=0 .. \