diff --git a/src/adservice/Dockerfile b/src/adservice/Dockerfile
index c4e1abc..caac9e0 100644
--- a/src/adservice/Dockerfile
+++ b/src/adservice/Dockerfile
@@ -7,10 +7,10 @@ WORKDIR /app
 # This is because the protoc-gen-grpc-java library 
 # is a glibc compiled binary and alpine is
 # based on musl-libc
-RUN  apk add --no-cache --allow-untrusted \
-    -X https://apkproxy.herokuapp.com/sgerrand/alpine-pkg-glibc \
-    glibc \
-    glibc-bin
+RUN apk --no-cache add ca-certificates && \
+    wget -q -O /etc/apk/keys/sgerrand.rsa.pub https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub && \
+    wget https://github.com/sgerrand/alpine-pkg-glibc/releases/download/2.28-r0/glibc-2.28-r0.apk && \
+    apk add glibc-2.28-r0.apk
 
 # Next three steps are for caching dependency downloads
 # to improve subsequent docker build.