diff --git a/jhdf/build.gradle b/jhdf/build.gradle
index ac36b634..1a70fde7 100644
--- a/jhdf/build.gradle
+++ b/jhdf/build.gradle
@@ -56,7 +56,7 @@ dependencies {
 
     // Use JUnit 5 test framework
     testImplementation group: 'org.junit.jupiter', name: 'junit-jupiter', version: '5.10.0'
-    testRuntimeOnly group: 'org.slf4j', name: 'slf4j-simple', version: '1.7.36'
+    testRuntimeOnly group: 'org.slf4j', name: 'slf4j-simple', version: '2.0.9'
 
     // Mocking
     testImplementation group: 'org.mockito', name: 'mockito-inline', version: '4.11.0'