diff --git a/changelog/unreleased/PR#4300-update-org-apache-zookeeper-to-v3-9-5-branch-9x.yml b/changelog/unreleased/PR#4300-update-org-apache-zookeeper-to-v3-9-5-branch-9x.yml
new file mode 100644
index 000000000000..e987f764d70e
--- /dev/null
+++ b/changelog/unreleased/PR#4300-update-org-apache-zookeeper-to-v3-9-5-branch-9x.yml
@@ -0,0 +1,7 @@
+title: Update org.apache.zookeeper:* to v3.9.5 (branch_9x)
+type: dependency_update
+authors:
+- name: solrbot
+links:
+- name: PR#4300
+  url: https://github.com/apache/solr/pull/4300
diff --git a/solr/licenses/netty-tcnative-boringssl-static-2.0.73.Final.jar.sha1 b/solr/licenses/netty-tcnative-boringssl-static-2.0.73.Final.jar.sha1
deleted file mode 100644
index 0bea976dc344..000000000000
--- a/solr/licenses/netty-tcnative-boringssl-static-2.0.73.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-de7380a74a7611e9937dd2106abfde5b405dbd15
diff --git a/solr/licenses/netty-tcnative-boringssl-static-2.0.74.Final.jar.sha1 b/solr/licenses/netty-tcnative-boringssl-static-2.0.74.Final.jar.sha1
new file mode 100644
index 000000000000..c19d8959abd3
--- /dev/null
+++ b/solr/licenses/netty-tcnative-boringssl-static-2.0.74.Final.jar.sha1
@@ -0,0 +1 @@
+536b68a3bdabab178c042402150309db00e8f54d
diff --git a/solr/licenses/netty-tcnative-classes-2.0.73.Final.jar.sha1 b/solr/licenses/netty-tcnative-classes-2.0.73.Final.jar.sha1
deleted file mode 100644
index 048e8b91eba6..000000000000
--- a/solr/licenses/netty-tcnative-classes-2.0.73.Final.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-f50d875a46e4a7768f35dbc26fb796fd791b8b09
diff --git a/solr/licenses/netty-tcnative-classes-2.0.74.Final.jar.sha1 b/solr/licenses/netty-tcnative-classes-2.0.74.Final.jar.sha1
new file mode 100644
index 000000000000..6b8889366709
--- /dev/null
+++ b/solr/licenses/netty-tcnative-classes-2.0.74.Final.jar.sha1
@@ -0,0 +1 @@
+c3b2e6ac13230849355f7ecaaeb12668a22e9c0a
diff --git a/solr/licenses/zookeeper-3.9.4-tests.jar.sha1 b/solr/licenses/zookeeper-3.9.4-tests.jar.sha1
deleted file mode 100644
index 6356f7db3e5b..000000000000
--- a/solr/licenses/zookeeper-3.9.4-tests.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-c4afb93bf1bf14be5f46fdc6197c3a87253e12de
diff --git a/solr/licenses/zookeeper-3.9.4.jar.sha1 b/solr/licenses/zookeeper-3.9.4.jar.sha1
deleted file mode 100644
index 5618c166ffe9..000000000000
--- a/solr/licenses/zookeeper-3.9.4.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-5ab49d76fcac9a33c255b0585bc1fc92e24166db
diff --git a/solr/licenses/zookeeper-3.9.5-tests.jar.sha1 b/solr/licenses/zookeeper-3.9.5-tests.jar.sha1
new file mode 100644
index 000000000000..5207d70421ab
--- /dev/null
+++ b/solr/licenses/zookeeper-3.9.5-tests.jar.sha1
@@ -0,0 +1 @@
+95b919c8cdd6f580b5c2de6743ac55b299e26b98
diff --git a/solr/licenses/zookeeper-3.9.5.jar.sha1 b/solr/licenses/zookeeper-3.9.5.jar.sha1
new file mode 100644
index 000000000000..09c7438cb45e
--- /dev/null
+++ b/solr/licenses/zookeeper-3.9.5.jar.sha1
@@ -0,0 +1 @@
+4f091e2a604d7c6a818ac2a7169e3bad5a5441dc
diff --git a/solr/licenses/zookeeper-jute-3.9.4.jar.sha1 b/solr/licenses/zookeeper-jute-3.9.4.jar.sha1
deleted file mode 100644
index 09804f247943..000000000000
--- a/solr/licenses/zookeeper-jute-3.9.4.jar.sha1
+++ /dev/null
@@ -1 +0,0 @@
-db554b1c2b284a95274626126d9e1acb0e21ae4a
diff --git a/solr/licenses/zookeeper-jute-3.9.5.jar.sha1 b/solr/licenses/zookeeper-jute-3.9.5.jar.sha1
new file mode 100644
index 000000000000..ea7258d056fb
--- /dev/null
+++ b/solr/licenses/zookeeper-jute-3.9.5.jar.sha1
@@ -0,0 +1 @@
+20135d3521579fd7382fed744f6b74241ecb5b73
diff --git a/versions.lock b/versions.lock
index b99b5dd0c59d..985ca7efada9 100644
--- a/versions.lock
+++ b/versions.lock
@@ -122,14 +122,14 @@ io.netty:netty-codec-http:4.2.6.Final (4 constraints: 7e2ec1d0)
 io.netty:netty-codec-http2:4.2.6.Final (2 constraints: dd158907)
 io.netty:netty-codec-socks:4.2.6.Final (2 constraints: ac196ff4)
 io.netty:netty-common:4.2.6.Final (14 constraints: 9fcdf69f)
-io.netty:netty-handler:4.2.6.Final (5 constraints: db4410c9)
+io.netty:netty-handler:4.2.6.Final (5 constraints: d444e1c8)
 io.netty:netty-handler-proxy:4.2.6.Final (2 constraints: dd158907)
 io.netty:netty-resolver:4.2.6.Final (3 constraints: ba2429ff)
-io.netty:netty-tcnative-boringssl-static:2.0.73.Final (2 constraints: cf1ad957)
-io.netty:netty-tcnative-classes:2.0.73.Final (2 constraints: d21e0195)
+io.netty:netty-tcnative-boringssl-static:2.0.74.Final (2 constraints: d31af557)
+io.netty:netty-tcnative-classes:2.0.74.Final (2 constraints: d31e0895)
 io.netty:netty-transport:4.2.6.Final (11 constraints: 16a7be79)
 io.netty:netty-transport-classes-epoll:4.2.6.Final (2 constraints: 491d6c04)
-io.netty:netty-transport-native-epoll:4.2.6.Final (2 constraints: d61a4e5f)
+io.netty:netty-transport-native-epoll:4.2.6.Final (2 constraints: cf1a1f5f)
 io.netty:netty-transport-native-unix-common:4.2.6.Final (5 constraints: a647dc44)
 io.opencensus:opencensus-api:0.31.1 (5 constraints: 924d4692)
 io.opencensus:opencensus-contrib-http-util:0.31.1 (3 constraints: 7232a9fc)
@@ -259,8 +259,8 @@ org.apache.tika:tika-core:3.2.3 (1 constraints: 0a050336)
 org.apache.tika:tika-langdetect-tika:3.2.3 (1 constraints: 0a050336)
 org.apache.tomcat:annotations-api:6.0.53 (1 constraints: 40054e3b)
 org.apache.xmlbeans:xmlbeans:5.3.0 (2 constraints: 72173c75)
-org.apache.zookeeper:zookeeper:3.9.4 (3 constraints: a91e460b)
-org.apache.zookeeper:zookeeper-jute:3.9.4 (2 constraints: a1120324)
+org.apache.zookeeper:zookeeper:3.9.5 (3 constraints: aa1e950b)
+org.apache.zookeeper:zookeeper-jute:3.9.5 (2 constraints: a3122c24)
 org.apiguardian:apiguardian-api:1.1.2 (2 constraints: 601bd5a8)
 org.bitbucket.b_c:jose4j:0.9.6 (2 constraints: 14106bd4)
 org.carrot2:carrot2-core:4.5.1 (1 constraints: 0c050f36)
diff --git a/versions.props b/versions.props
index b95645350ce2..15c8fde23674 100644
--- a/versions.props
+++ b/versions.props
@@ -61,7 +61,7 @@ org.apache.lucene:*=9.12.3
 org.apache.poi:*=5.5.1
 org.apache.tika:*=3.2.3
 org.apache.tomcat:annotations-api=6.0.53
-org.apache.zookeeper:*=3.9.4
+org.apache.zookeeper:*=3.9.5
 org.bitbucket.b_c:jose4j=0.9.6
 org.bouncycastle:bcpkix-jdk18on=1.82
 org.carrot2:carrot2-core=4.5.1