diff --git a/poitest/build.gradle b/poitest/build.gradle
index 5cd98c362..565964126 100644
--- a/poitest/build.gradle
+++ b/poitest/build.gradle
@@ -7,9 +7,10 @@ repositories {
 
 dependencies {
     implementation 'com.android.support:multidex:1.0.3'
-    implementation 'com.android.support:support-v4:27.1.0'
+    implementation 'com.android.support:support-v4:27.1.1'
+    // commons-text 1.8 fails due to Java 8 dependency
     implementation 'org.apache.commons:commons-text:1.3'
-    // for unit-tests copied from Apache POI source
+    // for unit-tests copied from Apache POI source, 1.64 did not work!
     implementation 'org.bouncycastle:bcpkix-jdk15on:1.59'
 
     // newer versions of xmlsec are compiled with JDK 8 which does not work in Android Studio 2.x!