diff --git a/src/main/kotlin/dev/dnpm/etl/processor/config/AppConfiguration.kt b/src/main/kotlin/dev/dnpm/etl/processor/config/AppConfiguration.kt
index 70ae0f5..c8e86fb 100644
--- a/src/main/kotlin/dev/dnpm/etl/processor/config/AppConfiguration.kt
+++ b/src/main/kotlin/dev/dnpm/etl/processor/config/AppConfiguration.kt
@@ -27,6 +27,7 @@ import dev.dnpm.etl.processor.pseudonym.GpasPseudonymGenerator
 import dev.dnpm.etl.processor.pseudonym.PseudonymizeService
 import dev.dnpm.etl.processor.services.Transformation
 import dev.dnpm.etl.processor.services.TransformationService
+import org.slf4j.LoggerFactory
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty
 import org.springframework.boot.context.properties.EnableConfigurationProperties
 import org.springframework.context.annotation.Bean
@@ -43,6 +44,8 @@ import reactor.core.publisher.Sinks
 )
 class AppConfiguration {
 
+    private val logger = LoggerFactory.getLogger(AppConfiguration::class.java)
+
     @ConditionalOnProperty(value = ["app.pseudonymizer"], havingValue = "GPAS")
     @Bean
     fun gpasPseudonymGenerator(configProperties: GPasConfigProperties): Generator {
@@ -78,6 +81,7 @@ class AppConfiguration {
         objectMapper: ObjectMapper,
         configProperties: AppConfigProperties
     ): TransformationService {
+        logger.info("Apply ${configProperties.transformations.size} transformation rules")
         return TransformationService(objectMapper, configProperties.transformations.map {
             Transformation.of(it.path) from it.from to it.to
         })