diff --git a/src/HealthChecks.Prometheus.Metrics/LivenessPrometheusMetrics.cs b/src/HealthChecks.Prometheus.Metrics/LivenessPrometheusMetrics.cs
index 1a3d3dd805..13b646090e 100644
--- a/src/HealthChecks.Prometheus.Metrics/LivenessPrometheusMetrics.cs
+++ b/src/HealthChecks.Prometheus.Metrics/LivenessPrometheusMetrics.cs
@@ -5,7 +5,7 @@ namespace HealthChecks.Prometheus.Metrics;
 
 public abstract class LivenessPrometheusMetrics
 {
-    protected const string CONTENT_TYPE = "text/plain; version=0.0.4";
+    protected const string CONTENT_TYPE = PrometheusConstants.TextContentTypeWithVersionAndEncoding;
     private const string HEALTH_CHECK_LABEL_NAME = "healthcheck";
     private readonly Gauge _healthChecksDuration;
     private readonly Gauge _healthChecksResult;
diff --git a/src/HealthChecks.Publisher.Prometheus/LivenessPrometheusMetrics.cs b/src/HealthChecks.Publisher.Prometheus/LivenessPrometheusMetrics.cs
index 2ef0a88a31..956272d4c7 100644
--- a/src/HealthChecks.Publisher.Prometheus/LivenessPrometheusMetrics.cs
+++ b/src/HealthChecks.Publisher.Prometheus/LivenessPrometheusMetrics.cs
@@ -5,7 +5,7 @@ namespace HealthChecks.Publisher.Prometheus;
 
 public abstract class LivenessPrometheusMetrics
 {
-    protected const string CONTENT_TYPE = "text/plain; version=0.0.4";
+    protected const string CONTENT_TYPE = PrometheusConstants.TextContentTypeWithVersionAndEncoding;
     private const string HEALTH_CHECK_LABEL_NAME = "healthcheck";
     private readonly Gauge _healthChecksDuration;
     private readonly Gauge _healthChecksResult;
diff --git a/test/HealthChecks.Prometheus.Metrics.Tests/HealthChecks.Prometheus.Metrics.approved.txt b/test/HealthChecks.Prometheus.Metrics.Tests/HealthChecks.Prometheus.Metrics.approved.txt
index 61a6663466..aa75eb6308 100644
--- a/test/HealthChecks.Prometheus.Metrics.Tests/HealthChecks.Prometheus.Metrics.approved.txt
+++ b/test/HealthChecks.Prometheus.Metrics.Tests/HealthChecks.Prometheus.Metrics.approved.txt
@@ -2,7 +2,7 @@ namespace HealthChecks.Prometheus.Metrics
 {
     public abstract class LivenessPrometheusMetrics
     {
-        protected const string CONTENT_TYPE = "text/plain; version=0.0.4";
+        protected const string CONTENT_TYPE = "text/plain; version=0.0.4; charset=utf-8";
         protected readonly Prometheus.CollectorRegistry Registry;
         protected void WriteMetricsFromHealthReport(Microsoft.Extensions.Diagnostics.HealthChecks.HealthReport report) { }
     }
diff --git a/test/HealthChecks.Publisher.Prometheus.Tests/HealthChecks.Publisher.Prometheus.approved.txt b/test/HealthChecks.Publisher.Prometheus.Tests/HealthChecks.Publisher.Prometheus.approved.txt
index 3fe7136602..d80ec8a8c4 100644
--- a/test/HealthChecks.Publisher.Prometheus.Tests/HealthChecks.Publisher.Prometheus.approved.txt
+++ b/test/HealthChecks.Publisher.Prometheus.Tests/HealthChecks.Publisher.Prometheus.approved.txt
@@ -2,7 +2,7 @@ namespace HealthChecks.Publisher.Prometheus
 {
     public abstract class LivenessPrometheusMetrics
     {
-        protected const string CONTENT_TYPE = "text/plain; version=0.0.4";
+        protected const string CONTENT_TYPE = "text/plain; version=0.0.4; charset=utf-8";
         protected readonly Prometheus.CollectorRegistry Registry;
         protected void WriteMetricsFromHealthReport(Microsoft.Extensions.Diagnostics.HealthChecks.HealthReport report) { }
     }