diff --git a/services/base-jdbc/src/main/java/org/eclipse/hono/service/base/jdbc/config/JdbcOptions.java b/services/base-jdbc/src/main/java/org/eclipse/hono/service/base/jdbc/config/JdbcOptions.java
index 65b72b7dc5..9a99158780 100644
--- a/services/base-jdbc/src/main/java/org/eclipse/hono/service/base/jdbc/config/JdbcOptions.java
+++ b/services/base-jdbc/src/main/java/org/eclipse/hono/service/base/jdbc/config/JdbcOptions.java
@@ -14,10 +14,10 @@
 package org.eclipse.hono.service.base.jdbc.config;
 
 import java.util.Optional;
-import java.util.OptionalInt;
 
 import io.smallrye.config.ConfigMapping;
 import io.smallrye.config.ConfigMapping.NamingStrategy;
+import io.smallrye.config.WithDefault;
 
 /**
  * Configuration properties for a JDBC service.
@@ -58,28 +58,32 @@ public interface JdbcOptions {
      *
      * @return The maximum number of connections in the pool.
      */
-    OptionalInt maximumPoolSize();
+    @WithDefault("15")
+    int maximumPoolSize();
 
     /**
      * Gets the minimum size of the DB connection pool.
      *
      * @return The minimum number of connections in the pool.
      */
-    OptionalInt minimumPoolSize();
+    @WithDefault("3")
+    int minimumPoolSize();
 
     /**
      * Gets the initial size of the DB connection pool.
      *
      * @return The initial number of connections in the pool.
      */
-    OptionalInt initialPoolSize();
+    @WithDefault("3")
+    int initialPoolSize();
 
     /**
      * Gets the maximum idle time of connections in the DB connection pool.
      *
      * @return The maximum idle time of connections in the pool.
      */
-    OptionalInt maximumIdleTime();
+    @WithDefault("3600")
+    int maximumIdleTime();
 
     /**
      * Gets the name of the table that contains the data.
diff --git a/services/base-jdbc/src/main/java/org/eclipse/hono/service/base/jdbc/config/JdbcProperties.java b/services/base-jdbc/src/main/java/org/eclipse/hono/service/base/jdbc/config/JdbcProperties.java
index 08561b4569..32a9329d87 100644
--- a/services/base-jdbc/src/main/java/org/eclipse/hono/service/base/jdbc/config/JdbcProperties.java
+++ b/services/base-jdbc/src/main/java/org/eclipse/hono/service/base/jdbc/config/JdbcProperties.java
@@ -32,10 +32,6 @@
 public class JdbcProperties {
 
     private static final Logger log = LoggerFactory.getLogger(JdbcProperties.class);
-    private static final Integer MAXIMUM_POOL_SIZE_DEFAULT = 15;
-    private static final Integer MINIMUM_POOL_SIZE_DEFAULT = 3;
-    private static final Integer INITIAL_POOL_SIZE_DEFAULT = 3;
-    private static final Integer MAXIMUM_IDLE_TIME_DEFAULT = 3600;
 
     private String url;
     private String driverClass;
@@ -63,10 +59,10 @@ public JdbcProperties() {
     public JdbcProperties(final JdbcOptions options) {
         Objects.requireNonNull(options);
         setDriverClass(options.driverClass());
-        options.maximumPoolSize().ifPresentOrElse(this::setMaximumPoolSize, () -> setMaximumPoolSize(MAXIMUM_POOL_SIZE_DEFAULT));
-        options.minimumPoolSize().ifPresentOrElse(this::setMinimumPoolSize, () -> setMinimumPoolSize(MINIMUM_POOL_SIZE_DEFAULT));
-        options.initialPoolSize().ifPresentOrElse(this::setInitialPoolSize, () -> setInitialPoolSize(INITIAL_POOL_SIZE_DEFAULT));
-        options.maximumIdleTime().ifPresentOrElse(this::setMaximumIdleTime, () -> setMaximumIdleTime(MAXIMUM_IDLE_TIME_DEFAULT));
+        setMaximumPoolSize(options.maximumPoolSize());
+        setMinimumPoolSize(options.minimumPoolSize());
+        setInitialPoolSize(options.initialPoolSize());
+        setMaximumIdleTime(options.maximumIdleTime());
         options.password().ifPresent(this::setPassword);
         options.tableName().ifPresent(this::setTableName);
         setUrl(options.url());