diff --git a/bom/application/pom.xml b/bom/application/pom.xml
index 684490776ec8e..9806c09d4afd9 100644
--- a/bom/application/pom.xml
+++ b/bom/application/pom.xml
@@ -35,7 +35,7 @@
         <microprofile-reactive-streams-operators.version>1.0.1</microprofile-reactive-streams-operators.version>
         <microprofile-rest-client.version>1.4.1</microprofile-rest-client.version>
         <smallrye-common.version>1.4.1</smallrye-common.version>
-        <smallrye-config.version>1.9.2</smallrye-config.version>
+        <smallrye-config.version>1.9.3</smallrye-config.version>
         <smallrye-health.version>2.2.5</smallrye-health.version>
         <smallrye-metrics.version>2.4.4</smallrye-metrics.version>
         <smallrye-open-api.version>2.0.13</smallrye-open-api.version>
diff --git a/core/runtime/src/main/java/io/quarkus/runtime/configuration/Substitutions.java b/core/runtime/src/main/java/io/quarkus/runtime/configuration/Substitutions.java
index 237f70a3cc1ef..3a35bda308015 100644
--- a/core/runtime/src/main/java/io/quarkus/runtime/configuration/Substitutions.java
+++ b/core/runtime/src/main/java/io/quarkus/runtime/configuration/Substitutions.java
@@ -13,6 +13,7 @@
 import com.oracle.svm.core.threadlocal.FastThreadLocalInt;
 
 import io.smallrye.common.constraint.Assert;
+import io.smallrye.config.ConfigMappingMetadata;
 import io.smallrye.config.Expressions;
 
 /**
@@ -56,6 +57,15 @@ public static <T> T withoutExpansion(Supplier<T> supplier) {
 
     @TargetClass(className = "io.smallrye.config.ConfigMappingLoader")
     static final class Target_ConfigMappingLoader {
+        @Substitute
+        static Class<?> loadClass(final Class<?> parent, final ConfigMappingMetadata configMappingMetadata) {
+            try {
+                return parent.getClassLoader().loadClass(configMappingMetadata.getClassName());
+            } catch (ClassNotFoundException e) {
+                return null;
+            }
+        }
+
         @Substitute
         private static Class<?> defineClass(final Class<?> parent, final String className, final byte[] classBytes) {
             return null;
@@ -77,5 +87,11 @@ public static Target_ConfigMappingInterface getConfigurationInterface(Class<?> i
                 return null;
             }
         }
+
+        // This should not be called, but we substitute it anyway to make sure we remove any references to ASM classes.
+        @Substitute
+        public byte[] getClassBytes() {
+            return null;
+        }
     }
 }