diff --git a/ci/deploy.sh b/ci/deploy.sh
index 9b452aa61..9c106d138 100755
--- a/ci/deploy.sh
+++ b/ci/deploy.sh
@@ -48,6 +48,7 @@ case $OSTYPE in
 
     set +x
     if [ -n "$MACOS_CERT" ] ; then
+      echo $MACOS_CERT | base64 —decode > certificate.p12
       security create-keychain -p "$MACOS_PW" build.keychain
       security default-keychain -s build.keychain
       security unlock-keychain -p "$MACOS_PW" build.keychain