diff --git a/README.md b/README.md
index d9964d3..6e85076 100644
--- a/README.md
+++ b/README.md
@@ -115,7 +115,7 @@ and register the SSH public key of root as __deploy key__ to allow readonly acce
        || (ssh-keygen \
            -t ed25519 \
            -f "/root/.ssh/id_ed25519" -q -N "" \
-           -C "$(date +%Y%m%d):root@$(hostname -b)" \
+           -C "$(date +%Y%m%d)-root@$(hostname -b)" \
        && cat "/root/.ssh/id_ed25519.pub")
    ```
 
@@ -145,7 +145,7 @@ cat "${JENKINS_HOME}/.ssh/id_ed25519.pub" \
     || (ssh-keygen \
         -t ed25519 \
         -f "${JENKINS_HOME}/.ssh/id_ed25519" -q -N "" \
-        -C "$(date +%Y%m%d):$(whoami)@$(echo ${JENKINS_URL} | cut -d/ -f3)" \
+        -C "$(date +%Y%m%d)-$(whoami)@$(echo ${JENKINS_URL} | cut -d/ -f3)" \
     && cat "${JENKINS_HOME}/.ssh/id_ed25519.pub")
 
 # add your host here, note the tailing '&' to run it in parallel
diff --git a/prepareThisHostBeforeCloning.sh b/prepareThisHostBeforeCloning.sh
index f1ece09..58aaaa0 100755
--- a/prepareThisHostBeforeCloning.sh
+++ b/prepareThisHostBeforeCloning.sh
@@ -33,7 +33,7 @@ function prepareThisHost() {
     ssh-keygen \
         -t ed25519 \
         -f "/root/.ssh/id_ed25519" -q -N "" \
-        -C "$(date +%Y%m%d):root@$(hostname -b)"
+        -C "$(date +%Y%m%d)-root@$(hostname -b)"
 
     cat "/root/.ssh/id_ed25519.pub" \
         && return 0