diff --git a/docker/Dockerfile.env b/docker/Dockerfile.env
index cdca53f2c..b2ca7c202 100644
--- a/docker/Dockerfile.env
+++ b/docker/Dockerfile.env
@@ -2,7 +2,7 @@ FROM ubuntu:20.04
 ENV DEBIAN_FRONTEND=noninteractive
 RUN apt-get update && apt-get install --no-install-recommends software-properties-common -y
 # 18.04 includes 2.17 but github requires 2.18+ to support submodules.
-RUN add-apt-repository ppa:git-core/ppa
+#RUN add-apt-repository ppa:git-core/ppa
 ADD .github/workflows/install_dependencies_run.sh install_dependencies_run.sh
 RUN bash install_dependencies_run.sh
 RUN curl https://bootstrap.pypa.io/get-pip.py -o get-pip.py