diff --git a/src/main/java/net/hostsharing/hsadminng/config/CasAuthenticator.java b/src/main/java/net/hostsharing/hsadminng/config/CasAuthenticator.java
index 9fe55f5e..e0d8a9f1 100644
--- a/src/main/java/net/hostsharing/hsadminng/config/CasAuthenticator.java
+++ b/src/main/java/net/hostsharing/hsadminng/config/CasAuthenticator.java
@@ -1,5 +1,6 @@
 package net.hostsharing.hsadminng.config;
 
+import io.micrometer.core.annotation.Timed;
 import lombok.SneakyThrows;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.beans.factory.annotation.Value;
@@ -25,6 +26,7 @@ public class CasAuthenticator implements Authenticator {
     private final RestTemplate restTemplate = new RestTemplate();
 
     @SneakyThrows
+    @Timed("app.cas.authenticate")
     public String authenticate(final HttpServletRequest httpRequest) {
         final var userName = StringUtils.isBlank(casServerUrl)
                 ? bypassCurrentSubject(httpRequest)