diff --git a/caddy2/php7.4-gmagick/Dockerfile b/caddy2/php7.4-gmagick/Dockerfile
index 79b4b86..817e6c0 100644
--- a/caddy2/php7.4-gmagick/Dockerfile
+++ b/caddy2/php7.4-gmagick/Dockerfile
@@ -18,7 +18,7 @@ RUN docker-php-ext-install soap
 
 # Install graphicsmagick
 RUN apk add --no-cache graphicsmagick
-RUN apk add --no-cache --repository http://dl-3.alpinelinux.org/alpine/edge/testing/ jasper-dev jasper-libs
+RUN apk add --no-cache --repository http://dl-3.alpinelinux.org/alpine/edge/testing/ --allow-untrusted jasper-dev jasper-libs
 RUN apk add --no-cache --virtual .phpize-deps $PHPIZE_DEPS libtool g++ make autoconf graphicsmagick-dev
 RUN pecl install gmagick-2.0.5RC1 && docker-php-ext-enable gmagick