diff --git a/changelog/unreleased/PR#4028-update-io-prometheus-prometheus-to-v1-4-3-branch.yml b/changelog/unreleased/PR#4028-update-io-prometheus-prometheus-to-v1-4-3-branch.yml
new file mode 100644
index 000000000000..bb56ab3cf3d4
--- /dev/null
+++ b/changelog/unreleased/PR#4028-update-io-prometheus-prometheus-to-v1-4-3-branch.yml
@@ -0,0 +1,7 @@
+title: Update io.prometheus:prometheus* to v1.4.3 (branch_9x)
+type: dependency_update
+authors:
+- name: solrbot
+links:
+- name: PR#4028
+  url: https://github.com/apache/solr/pull/4028
diff --git a/solr/licenses/prometheus-metrics-config-1.4.3.jar.sha1 b/solr/licenses/prometheus-metrics-config-1.4.3.jar.sha1
new file mode 100644
index 000000000000..fc3f58556d15
--- /dev/null
+++ b/solr/licenses/prometheus-metrics-config-1.4.3.jar.sha1
@@ -0,0 +1 @@
+785bf741491702f0e755a6a5c9c58a8127db0683
diff --git a/solr/licenses/prometheus-metrics-exposition-formats-1.1.0.jar.sha1 b/solr/licenses/prometheus-metrics-exposition-formats-1.1.0.jar.sha1
deleted file mode 100644
index 60b2586d8679..000000000000
--- a/solr/licenses/prometheus-metrics-exposition-formats-1.1.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-466f12bdde0dcb5b5469d1bd01370db7b62bead3
diff --git a/solr/licenses/prometheus-metrics-exposition-formats-1.4.3.jar.sha1 b/solr/licenses/prometheus-metrics-exposition-formats-1.4.3.jar.sha1
new file mode 100644
index 000000000000..faf33af51e7e
--- /dev/null
+++ b/solr/licenses/prometheus-metrics-exposition-formats-1.4.3.jar.sha1
@@ -0,0 +1 @@
+14eeb4e0a6a366d6b7562e4457e2a863b837b5bd
diff --git a/solr/licenses/prometheus-metrics-exposition-textformats-1.4.3.jar.sha1 b/solr/licenses/prometheus-metrics-exposition-textformats-1.4.3.jar.sha1
new file mode 100644
index 000000000000..0cd653b08009
--- /dev/null
+++ b/solr/licenses/prometheus-metrics-exposition-textformats-1.4.3.jar.sha1
@@ -0,0 +1 @@
+3a4f58da44fdb1a26bbda60cf38930db62f2f887
diff --git a/solr/licenses/prometheus-metrics-model-1.1.0.jar.sha1 b/solr/licenses/prometheus-metrics-model-1.1.0.jar.sha1
deleted file mode 100644
index 6cac482dd0ce..000000000000
--- a/solr/licenses/prometheus-metrics-model-1.1.0.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-4a6093076e5b526aff26611e6c4f0eb4518211b3
diff --git a/solr/licenses/prometheus-metrics-model-1.4.3.jar.sha1 b/solr/licenses/prometheus-metrics-model-1.4.3.jar.sha1
new file mode 100644
index 000000000000..1171e238d9f2
--- /dev/null
+++ b/solr/licenses/prometheus-metrics-model-1.4.3.jar.sha1
@@ -0,0 +1 @@
+b18da634ccdc033468c0a17e56996de09b4e6b36
diff --git a/versions.lock b/versions.lock
index b99b5dd0c59d..6b027ea25e2c 100644
--- a/versions.lock
+++ b/versions.lock
@@ -154,8 +154,10 @@ 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: 22216516)
-io.prometheus:prometheus-metrics-exposition-formats:1.1.0 (1 constraints: 0405f335)
-io.prometheus:prometheus-metrics-model:1.1.0 (2 constraints: 411b133b)
+io.prometheus:prometheus-metrics-config:1.4.3 (1 constraints: da101dbb)
+io.prometheus:prometheus-metrics-exposition-formats:1.4.3 (1 constraints: 0405f335)
+io.prometheus:prometheus-metrics-exposition-textformats:1.4.3 (1 constraints: 44165ad8)
+io.prometheus:prometheus-metrics-model:1.4.3 (2 constraints: 0c1d82b6)
 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 b95645350ce2..ae2b7e3c8542 100644
--- a/versions.props
+++ b/versions.props
@@ -31,7 +31,7 @@ io.netty:netty*=4.2.6.Final
 io.netty:netty-tcnative*=2.0.73.Final
 io.opentelemetry:opentelemetry-bom=1.53.0
 io.opentracing:opentracing*=0.33.0
-io.prometheus:prometheus*=1.1.0
+io.prometheus:prometheus*=1.4.3
 io.prometheus:simpleclient*=0.16.0
 io.swagger.core.v3:*=2.2.22
 jakarta.ws.rs:jakarta.ws.rs-api=3.1.0