diff --git a/changelog/unreleased/PR#4371-update-io-prometheus-prometheus-to-v1-6-0-branch.yml b/changelog/unreleased/PR#4371-update-io-prometheus-prometheus-to-v1-6-0-branch.yml
new file mode 100644
index 00000000000..8aaae3d613e
--- /dev/null
+++ b/changelog/unreleased/PR#4371-update-io-prometheus-prometheus-to-v1-6-0-branch.yml
@@ -0,0 +1,7 @@
+title: Update io.prometheus:prometheus* to v1.6.0 (branch_9x)
+type: dependency_update
+authors:
+- name: solrbot
+links:
+- name: PR#4371
+  url: https://github.com/apache/solr/pull/4371
diff --git a/changelog/unreleased/PR#4371-update-io-prometheus-prometheus-to-v1-6-1-branch.yml b/changelog/unreleased/PR#4371-update-io-prometheus-prometheus-to-v1-6-1-branch.yml
new file mode 100644
index 00000000000..496223790f5
--- /dev/null
+++ b/changelog/unreleased/PR#4371-update-io-prometheus-prometheus-to-v1-6-1-branch.yml
@@ -0,0 +1,7 @@
+title: Update io.prometheus:prometheus* to v1.6.1 (branch_9x)
+type: dependency_update
+authors:
+- name: solrbot
+links:
+- name: PR#4371
+  url: https://github.com/apache/solr/pull/4371
diff --git a/solr/licenses/prometheus-metrics-config-1.5.1.jar.sha1 b/solr/licenses/prometheus-metrics-config-1.5.1.jar.sha1
deleted file mode 100644
index 2212deb0d19..00000000000
--- a/solr/licenses/prometheus-metrics-config-1.5.1.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-ad86683e4e0047f0c85906378bc3b6214155e4f6
diff --git a/solr/licenses/prometheus-metrics-config-1.6.1.jar.sha1 b/solr/licenses/prometheus-metrics-config-1.6.1.jar.sha1
new file mode 100644
index 00000000000..48eae182be0
--- /dev/null
+++ b/solr/licenses/prometheus-metrics-config-1.6.1.jar.sha1
@@ -0,0 +1 @@
+ab47af126e8e2f933d790dfa62beb5825e7576a6
diff --git a/solr/licenses/prometheus-metrics-exposition-textformats-1.5.1.jar.sha1 b/solr/licenses/prometheus-metrics-exposition-textformats-1.5.1.jar.sha1
deleted file mode 100644
index cc15cff4dda..00000000000
--- a/solr/licenses/prometheus-metrics-exposition-textformats-1.5.1.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-a19fc890e26391515134c2a3f4ae960b7d393206
diff --git a/solr/licenses/prometheus-metrics-exposition-textformats-1.6.1.jar.sha1 b/solr/licenses/prometheus-metrics-exposition-textformats-1.6.1.jar.sha1
new file mode 100644
index 00000000000..598d9a85131
--- /dev/null
+++ b/solr/licenses/prometheus-metrics-exposition-textformats-1.6.1.jar.sha1
@@ -0,0 +1 @@
+606b727a9cb02a162a8418d96b788430c3037e44
diff --git a/solr/licenses/prometheus-metrics-model-1.5.1.jar.sha1 b/solr/licenses/prometheus-metrics-model-1.5.1.jar.sha1
deleted file mode 100644
index 537c9850f84..00000000000
--- a/solr/licenses/prometheus-metrics-model-1.5.1.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-4fc0389959f2d4b7812fac6af1e925c4c1991fbb
diff --git a/solr/licenses/prometheus-metrics-model-1.6.1.jar.sha1 b/solr/licenses/prometheus-metrics-model-1.6.1.jar.sha1
new file mode 100644
index 00000000000..0f8927d6159
--- /dev/null
+++ b/solr/licenses/prometheus-metrics-model-1.6.1.jar.sha1
@@ -0,0 +1 @@
+72825c7aa87dc98b140d6d5dd45b5f22bbb00878
diff --git a/versions.lock b/versions.lock
index 659611f7d41..69116aa6fcf 100644
--- a/versions.lock
+++ b/versions.lock
@@ -155,9 +155,9 @@ io.opentracing:opentracing-api:0.33.0 (6 constraints: 195100dd)
 io.opentracing:opentracing-noop:0.33.0 (4 constraints: 48361e21)
 io.opentracing:opentracing-util:0.33.0 (3 constraints: f71f843b)
 io.perfmark:perfmark-api:0.27.0 (3 constraints: 24218716)
-io.prometheus:prometheus-metrics-config:1.5.1 (1 constraints: d9101ebb)
-io.prometheus:prometheus-metrics-exposition-textformats:1.5.1 (1 constraints: 09050036)
-io.prometheus:prometheus-metrics-model:1.5.1 (2 constraints: 101dd0b7)
+io.prometheus:prometheus-metrics-config:1.6.1 (1 constraints: da1021bb)
+io.prometheus:prometheus-metrics-exposition-textformats:1.6.1 (1 constraints: 0a050336)
+io.prometheus:prometheus-metrics-model:1.6.1 (2 constraints: 121d16b8)
 io.prometheus:simpleclient:0.16.0 (3 constraints: 9d257513)
 io.prometheus:simpleclient_common:0.16.0 (1 constraints: 1a1139c0)
 io.prometheus:simpleclient_httpserver:0.16.0 (1 constraints: 3905353b)
diff --git a/versions.props b/versions.props
index 9696656c75e..a9505380bba 100644
--- a/versions.props
+++ b/versions.props
@@ -31,7 +31,7 @@ io.netty:netty*=4.2.12.Final
 io.netty:netty-tcnative*=2.0.75.Final
 io.opentelemetry:opentelemetry-bom=1.53.0
 io.opentracing:opentracing*=0.33.0
-io.prometheus:prometheus*=1.5.1
+io.prometheus:prometheus*=1.6.1
 io.prometheus:simpleclient*=0.16.0
 io.swagger.core.v3:*=2.2.22
 jakarta.ws.rs:jakarta.ws.rs-api=3.1.0