diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 071a1ed..6381817 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -21,7 +21,7 @@
       - name: Run tests
         run: ./gradlew test --no-daemon
       - name: Upload build artifacts
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: korapxmltool-jar
           path: app/build/libs/*.jar
diff --git a/CHANGELOG.md b/CHANGELOG.md
index c6e5662..a510e0d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,10 @@
 - `-o` option for `-T` with docker taggers
 - Log to log files only
 
+### Updated
+
+- opennlp-tools from 2.5.6.1 to 2.5.7
+
 ## [v3.1.0] - 2025-12-04
 
 ### Fixed
diff --git a/Readme.md b/Readme.md
index 99d37f5..51342b5 100644
--- a/Readme.md
+++ b/Readme.md
@@ -12,7 +12,7 @@
 
 Converts between KorAP-XML ZIP format and formats like CoNLL-U, Krill, word2vec, NOW and annotates KorAP XML ZIPs with various taggers and parsers.
 
-Drop-in replacement for korapxml2conllu, conllu2korapxml (see [KorAP-XML-CoNLL-U](https://github.com/KorAP/KorAP-XML-CoNLL-U)) and korapxml2krill (see [KorAP-XML-Krill](httpss://github.com/KorAP/KorAP-XML-Krill)), but still in the experimental stage. This concerns in particular the command line options, which might not yet be fully tested in all combinations.
+Drop-in replacement for korapxml2conllu, conllu2korapxml (see [KorAP-XML-CoNLL-U](https://github.com/KorAP/KorAP-XML-CoNLL-U)) and korapxml2krill (see [KorAP-XML-Krill](https://github.com/KorAP/KorAP-XML-Krill)), but still in the experimental stage. This concerns in particular the command line options, which might not yet be fully tested in all combinations.
 
 
 ## Prerequisites