diff --git a/extensions/devservices/common/src/main/java/io/quarkus/devservices/common/ConfigureUtil.java b/extensions/devservices/common/src/main/java/io/quarkus/devservices/common/ConfigureUtil.java
index fbd23fe8f2156..1ffa51b9ab7b3 100644
--- a/extensions/devservices/common/src/main/java/io/quarkus/devservices/common/ConfigureUtil.java
+++ b/extensions/devservices/common/src/main/java/io/quarkus/devservices/common/ConfigureUtil.java
@@ -4,6 +4,7 @@
 import java.io.InputStream;
 import java.io.UncheckedIOException;
 import java.util.Collections;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Properties;
 import java.util.concurrent.ConcurrentHashMap;
@@ -41,7 +42,7 @@ public static String configureSharedNetwork(GenericContainer<?> container, Strin
             container.setNetwork(Network.SHARED);
         }
 
-        String hostName = hostNamePrefix + "-" + Base58.randomString(5);
+        String hostName = (hostNamePrefix + "-" + Base58.randomString(5)).toLowerCase(Locale.ROOT);
         container.setNetworkAliases(Collections.singletonList(hostName));
 
         return hostName;