diff --git a/makeicecat b/makeicecat
index 9490c1f..0a59832 100755
--- a/makeicecat
+++ b/makeicecat
@@ -30,7 +30,7 @@ readonly SOURCEBALL_SIGNINGKEY='14F26682D0916CDD81E37B6D61B7B526D98F0353'
 readonly FFVERSION=${FFMAJOR}.${FFMINOR}.${FFSUB}
 readonly SOURCEBALL=firefox-${FFVERSION}esr.source.tar.xz
 readonly SOURCEBALL_URL=https://ftp.mozilla.org/pub/mozilla.org/firefox/releases/${FFVERSION}esr/source/${SOURCEBALL}
-readonly KEYSERVER=keyserver.ubuntu.com
+readonly KEYSERVER=hkp://keyserver.ubuntu.com:80
 
 # branding
 readonly INFO_URL=www.gnu.org/software/gnuzilla/
@@ -203,7 +203,7 @@ fetch_source()
 verify_sources()
 {
     echo Verifying Firefox tarball
-    gpg --recv-keys --keyserver keyserver.ubuntu.com ${SOURCEBALL_SIGNINGKEY}
+    gpg --recv-keys --keyserver ${KEYSERVER} ${SOURCEBALL_SIGNINGKEY}
     gpg --verify ${SOURCEBALL}.asc
     echo -n ${SOURCEBALL_CHECKSUM} ${SOURCEBALL} | sha256sum -c -
 }