diff --git a/.github/workflows/bazeltest.yml b/.github/workflows/bazeltest.yml
index d3fd30f2..e76f6780 100644
--- a/.github/workflows/bazeltest.yml
+++ b/.github/workflows/bazeltest.yml
@@ -54,17 +54,16 @@ jobs:
       - name: Checkout submodules
         run: git submodule update --init --recursive
       - name: Install Bazel on CI
-        run: |
+        run: |                                      
           wget https://github.com/bazelbuild/bazel/releases/download/5.3.0/bazel_5.3.0-linux-x86_64.deb
           sudo dpkg -i bazel_5.3.0-linux-x86_64.deb
       - name: Install requirements
         run: |
           python3 -m pip install -r requirements.txt
+      - name: Upgrade libc 
       # An LLVM update broke this test, fix per is https://bugs.llvm.org/show_bug.cgi?id=27310.
-      - name: Upgrade glibc to pypass 
         run: |
-          wget http://launchpadlibrarian.net/656214525/libc-bin_2.37-0ubuntu2_amd64.deb
-          sudo dpkg -i libc-bin_2.37-0ubuntu2_amd64.deb
+          apt-get upgrade libc-bin=2.31-0ubuntu9.9
       - name: Run C++ tests
         run: |
           bazel test --config=avx --config=openmp \
diff --git a/pybind_interface/Dockerfile b/pybind_interface/Dockerfile
index dbbe8d03..26c161c6 100644
--- a/pybind_interface/Dockerfile
+++ b/pybind_interface/Dockerfile
@@ -4,7 +4,7 @@ FROM qsim
 # Install additional requirements
 RUN apt-get install -y python3-dev python3-pybind11 python3-pytest python3-pip
 
-RUN apt-get remove python3-numpy --purge
+RUN apt-get remove -y python3-numpy --purge
 
 # The --force flag is used mainly so that the old numpy installation from pybind
 # gets replaced with the one cirq requires