diff --git a/Dockerfile b/Dockerfile
index a693e214..f35da0d1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,7 +13,8 @@ RUN apk add --update && \
     curl \
     git
 
-RUN curl -Lo /var/glibc.apk "https://github.com/sgerrand/alpine-pkg-glibc/releases/download/${GLIBC_VERSION}/glibc-${GLIBC_VERSION}.apk" && \
+RUN curl -Lo /etc/apk/keys/sgerrand.rsa.pub "https://alpine-pkgs.sgerrand.com/sgerrand.rsa.pub" && \
+    curl -Lo /var/glibc.apk "https://github.com/sgerrand/alpine-pkg-glibc/releases/download/${GLIBC_VERSION}/glibc-${GLIBC_VERSION}.apk" && \
     curl -Lo /var/glibc-bin.apk "https://github.com/sgerrand/alpine-pkg-glibc/releases/download/${GLIBC_VERSION}/glibc-bin-${GLIBC_VERSION}.apk" && \
     apk add /var/glibc-bin.apk /var/glibc.apk && \
     /usr/glibc-compat/sbin/ldconfig /lib /usr/glibc-compat/lib && \