diff --git a/micrometer-core/src/main/java/io/micronaut/configuration/metrics/binder/web/WebMetricsHelper.java b/micrometer-core/src/main/java/io/micronaut/configuration/metrics/binder/web/WebMetricsHelper.java
index c9b576e92..d7a005a54 100644
--- a/micrometer-core/src/main/java/io/micronaut/configuration/metrics/binder/web/WebMetricsHelper.java
+++ b/micrometer-core/src/main/java/io/micronaut/configuration/metrics/binder/web/WebMetricsHelper.java
@@ -250,8 +250,9 @@ static String sanitizePath(@Nullable String path) {
      * @param httpResponse the HTTP response
      */
     public void onResponse(HttpResponse<?> httpResponse) {
-        Throwable throwable = httpResponse.getAttribute(HttpAttributes.EXCEPTION, Throwable.class).orElse(null);
-        if (throwable != null) {
+        // Avoid using the conversion service for exceptions
+        Object exception = httpResponse.getAttribute(HttpAttributes.EXCEPTION).orElse(null);
+        if (exception instanceof Throwable throwable) {
             RouteMatch<?> routeMatch = httpResponse.getAttribute(HttpAttributes.ROUTE_MATCH, RouteMatch.class).orElse(null);
             if (routeMatch != null && routeMatch.getRouteInfo() instanceof ErrorRouteInfo<?, ?>) {
                 // Avoid publishing an error on error route