Dependabot: ignore Java 8 dependencies

diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index fc8e411..2a05b81 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -16,9 +16,17 @@
 #
 version: 2
 updates:
-  - package-ecosystem: maven
-    directory: "/"
-    schedule:
-      interval: daily
-      time: '04:00'
-    open-pull-requests-limit: 10
+- package-ecosystem: maven
+  directory: "/"
+  schedule:
+    interval: daily
+    time: '04:00'
+  open-pull-requests-limit: 10
+  ignore:
+# ignore Java 8+ dependencies
+    - dependency-name: org.mockito:mockito-core
+      versions:
+      - ">= 3.0"
+    - dependency-name: org.apache.commons:commons-lang3
+      versions:
+      - ">= 3.9"