diff --git a/Dockerfile b/Dockerfile
index 87969bc..a61ab55 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,8 +12,8 @@ RUN apt-get update \
             sudo supervisor nginx sqlite3 libcap2-bin \
     && mkdir -p ~/.gnupg \
     && echo "disable-ipv6" >> ~/.gnupg/dirmngr.conf \
-    && apt-key adv --homedir ~/.gnupg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys E5267A6C \
-    && apt-key adv --homedir ~/.gnupg --keyserver hkp://keyserver.ubuntu.com:80 --recv-keys C300EE8C \
+    && apt-key adv --homedir ~/.gnupg --keyserver hkp://keyserver.ubuntu.com --recv-keys E5267A6C \
+    && apt-key adv --homedir ~/.gnupg --keyserver hkp://keyserver.ubuntu.com --recv-keys C300EE8C \
     && echo "deb http://ppa.launchpad.net/ondrej/php/ubuntu focal main" > /etc/apt/sources.list.d/ppa_ondrej_php.list \
     && apt-get update