diff --git a/build.gradle b/build.gradle
index 4e95293..81be627 100644
--- a/build.gradle
+++ b/build.gradle
@@ -20,11 +20,13 @@ dependencies{
     bundledLibs 'org.libreoffice:ridl:5.3.2'
     bundledLibs 'org.libreoffice:unoil:5.3.2'
     bundledLibs 'org.json:json:20190722'
+    bundledLibs group: 'ch.qos.logback', name: 'logback-classic', version: '1.2.3'
+    bundledLibs group: 'ch.qos.logback', name: 'logback-core', version: '1.2.3'
     compile 'junit:junit:4.12'
     bundledLibs group: 'com.miglayout', name: 'miglayout-swing', version: '5.2'
     bundledLibs group: 'org.apache.jena', name: 'jena-core', version: '3.15.0'
     bundledLibs group: 'org.apache.jena', name: 'jena-arq', version: '3.15.0'
-    bundledLibs group: 'org.slf4j', name: 'slf4j-simple', version: '1.7.30'
+    bundledLibs group: 'org.slf4j', name: 'slf4j-api', version: '1.7.30'
     bundledLibs group: 'com.opencsv', name: 'opencsv', version: '5.1'
     bundledLibs files('idl')
     configurations.compile.extendsFrom(configurations.bundledLibs)