diff --git a/images/Dockerfile b/images/Dockerfile
index 81f5b9a288e..8eb06f3077f 100644
--- a/images/Dockerfile
+++ b/images/Dockerfile
@@ -45,8 +45,7 @@ RUN apt update -y \
     && rm -rf /var/lib/apt/lists/*
 
 # Configure git-core/ppa based on guidance here:  https://git-scm.com/download/linux
-RUN add-apt-repository ppa:git-core/ppa \
-    && apt update -y
+RUN add-apt-repository -y --no-update ppa:git-core/ppa
 
 RUN adduser --disabled-password --gecos "" --uid 1001 runner \
     && groupadd docker --gid 123 \