diff --git a/build.gradle b/build.gradle
index 34774f7..4e38263 100644
--- a/build.gradle
+++ b/build.gradle
@@ -20,7 +20,7 @@ dependencies {
     testCompile 'com.openpojo:openpojo:0.8.3'
     testCompile "org.codehaus.groovy:groovy-all:2.3.7"
     testCompile "org.spockframework:spock-core:1.0-groovy-2.4"
-    testRuntime 'org.slf4j:slf4j-simple:1.7.7'
+    testRuntime 'org.slf4j:slf4j-simple:1.7.29'
 }
 
 test {