diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 4fb31876aac6..09ab7e0d9a11 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -45,7 +45,7 @@ morfologik-ukrainian = "4.9.1"
 # benchmark/ html parsing
 nekohtml = "1.9.22"
 # analysis/opennlp/ support
-opennlp = "2.5.5"
+opennlp = "2.5.6"
 # distribution.tests/ process management
 procfork = "1.0.6"
 # unit tests
diff --git a/lucene/licenses/opennlp-tools-2.5.5.jar.sha1 b/lucene/licenses/opennlp-tools-2.5.5.jar.sha1
deleted file mode 100644
index 4a314b4c614a..000000000000
--- a/lucene/licenses/opennlp-tools-2.5.5.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-79947ea3a4248771cf2a992adae8819b54d44bb3
diff --git a/lucene/licenses/opennlp-tools-2.5.6.jar.sha1 b/lucene/licenses/opennlp-tools-2.5.6.jar.sha1
new file mode 100644
index 000000000000..b74291181914
--- /dev/null
+++ b/lucene/licenses/opennlp-tools-2.5.6.jar.sha1
@@ -0,0 +1 @@
+9d5d38502b8c16d08ae4990f105a65893da099a1
diff --git a/versions.lock b/versions.lock
index 6fe03e61e1b5..b2714ff66bf0 100644
--- a/versions.lock
+++ b/versions.lock
@@ -14,7 +14,7 @@
       "org.apache.commons:commons-compress:1.28.0" : "5ce8cdc6,refs=2",
       "org.apache.commons:commons-lang3:3.18.0" : "5ce8cdc6,refs=2",
       "org.apache.commons:commons-math3:3.6.1" : "85a1e4c6,refs=2",
-      "org.apache.opennlp:opennlp-tools:2.5.5" : "2f760bab,refs=4",
+      "org.apache.opennlp:opennlp-tools:2.5.6" : "2f760bab,refs=4",
       "org.carrot2:morfologik-fsa:2.1.9" : "79af844b,refs=4",
       "org.carrot2:morfologik-polish:2.1.9" : "fe494320,refs=3",
       "org.carrot2:morfologik-stemming:2.1.9" : "79af844b,refs=4",
@@ -59,7 +59,7 @@
       "org.apache.commons:commons-compress:1.28.0" : "6f16ff86,refs=2",
       "org.apache.commons:commons-lang3:3.18.0" : "6f16ff86,refs=2",
       "org.apache.commons:commons-math3:3.6.1" : "152d9f78,refs=3",
-      "org.apache.opennlp:opennlp-tools:2.5.5" : "b91715f0,refs=6",
+      "org.apache.opennlp:opennlp-tools:2.5.6" : "b91715f0,refs=6",
       "org.assertj:assertj-core:3.27.6" : "b7ba1646,refs=2",
       "org.carrot2:morfologik-fsa:2.1.9" : "e077a675,refs=8",
       "org.carrot2:morfologik-polish:2.1.9" : "cb00cecf,refs=5",