diff --git a/.docker/Dockerfile b/.docker/Dockerfile
index 6f962dbad58ec93a2e90a2d4f97b36daa712392e..b5cf23284bc7b095dcf18e2fdb6d8c3738674dbb 100644
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM julia:1.6
+FROM julia:1.6-bullseye
 
 RUN apt-get update && apt-get install -y cmake git python3-pip curl
 
diff --git a/.docker/install_cpplib.sh b/.docker/install_cpplib.sh
index 35eb745a07e8f8cec176fb0bcb8531c634b54105..10091c4332e7ec6c63ee2c222c95b9ac379d039d 100755
--- a/.docker/install_cpplib.sh
+++ b/.docker/install_cpplib.sh
@@ -14,7 +14,7 @@ fi
 git submodule update --init --recursive
 mkdir build
 cd build
-conan install .. -s "compiler.libcxx=libstdc++11"
+conan install .. --build=missing -s "compiler.libcxx=libstdc++11"
 cmake ..
 cmake --build .
 cmake --install .