diff --git a/images/shiori/Dockerfile b/images/shiori/Dockerfile
index 52fc5f1..b59fbda 100644
--- a/images/shiori/Dockerfile
+++ b/images/shiori/Dockerfile
@@ -7,7 +7,7 @@ RUN install_packages software-properties-common git gpg dirmngr gpg-agent gcc li
 # Add the golang apt repository
 # Note that install_packages runs apt update automatically
 # Apparentl apt-add-repository doesn't properly import the GPG key :-/
-RUN add-apt-repository --yes ppa:longsleep/golang-backports \
+RUN echo "deb http://ppa.launchpad.net/longsleep/golang-backports/ubuntu focal main" >/etc/apt/sources.list.d/golang.list \
 	&& apt-key adv --keyserver keyserver.ubuntu.com --recv-keys F6BC817356A3D45E
 
 RUN install_packages golang-go