diff --git a/Cargo.lock b/Cargo.lock
index 2b61633c2..97ee0a143 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1225,7 +1225,7 @@ dependencies = [
 
 [[package]]
 name = "rdkafka-sys"
-version = "4.9.0+2.10.0"
+version = "4.9.0+2.12.1"
 dependencies = [
  "cmake",
  "curl-sys",
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 3416a7fde..dcbd43155 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -1,6 +1,6 @@
 services:
   kafka:
-    image: bitnami/kafka:${KAFKA_VERSION:-4.0}
+    image: bitnamilegacy/kafka:${KAFKA_VERSION:-4.0}
     environment:
       # Enable KRaft mode (combined broker and controller)
       - KAFKA_CFG_NODE_ID=0
@@ -11,7 +11,7 @@ services:
       - KAFKA_CFG_ADVERTISED_LISTENERS=PLAINTEXT://localhost:9092
       - KAFKA_CFG_LISTENER_SECURITY_PROTOCOL_MAP=CONTROLLER:PLAINTEXT,PLAINTEXT:PLAINTEXT
       - KAFKA_CFG_CONTROLLER_QUORUM_VOTERS=0@localhost:9093
-      
+
       # Bitnami defaults
       - KAFKA_CFG_OFFSETS_TOPIC_REPLICATION_FACTOR=1
       - KAFKA_CFG_TRANSACTION_STATE_LOG_REPLICATION_FACTOR=1
diff --git a/rdkafka-sys/Cargo.toml b/rdkafka-sys/Cargo.toml
index c7d6a64f7..c56d4f88e 100644
--- a/rdkafka-sys/Cargo.toml
+++ b/rdkafka-sys/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rdkafka-sys"
-version = "4.9.0+2.10.0"
+version = "4.9.0+2.12.1"
 authors = ["Federico Giraud <giraud.federico@gmail.com>"]
 build = "build.rs"
 links = "rdkafka"
diff --git a/rdkafka-sys/changelog.md b/rdkafka-sys/changelog.md
index 8b73e1359..3a13c8efd 100644
--- a/rdkafka-sys/changelog.md
+++ b/rdkafka-sys/changelog.md
@@ -1,5 +1,8 @@
 # Changelog
 
+## vNEXT+2.12.1 (2025-11-05)
+* Bump librdkafka to v2.12.1.
+
 ## v4.9.0+2.10.0
 * Add cargo enforcement of MSRV of 1.74.
 * Bump librdkafka to v2.10.0.
diff --git a/rdkafka-sys/librdkafka b/rdkafka-sys/librdkafka
index c024ac13d..c56a3e684 160000
--- a/rdkafka-sys/librdkafka
+++ b/rdkafka-sys/librdkafka
@@ -1 +1 @@
-Subproject commit c024ac13daf98667de2b8724986e97f489644c15
+Subproject commit c56a3e68483ae33622901988ab9c4085f0785c3c
diff --git a/rdkafka-sys/src/bindings.rs b/rdkafka-sys/src/bindings.rs
index 38a9ba9dd..1e6f3bf05 100644
--- a/rdkafka-sys/src/bindings.rs
+++ b/rdkafka-sys/src/bindings.rs
@@ -1,9 +1,9 @@
-/* automatically generated by rust-bindgen 0.71.1 */
+/* automatically generated by rust-bindgen 0.72.1 */
 
 use libc::{c_char, c_int, c_void, sockaddr, FILE};
 use num_enum::TryFromPrimitive;
 
-pub const RD_KAFKA_VERSION: i32 = 34210047;
+pub const RD_KAFKA_VERSION: i32 = 34341375;
 pub const RD_KAFKA_DEBUG_CONTEXTS : & [u8 ; 138] = b"all,generic,broker,topic,metadata,feature,queue,msg,protocol,cgrp,security,fetch,interceptor,plugin,consumer,admin,eos,mock,assignor,conf\0" ;
 pub const RD_KAFKA_DESTROY_F_NO_CONSUMER_CLOSE: i32 = 8;
 pub const RD_KAFKA_OFFSET_BEGINNING: i32 = -2;
@@ -3793,7 +3793,7 @@ extern "C" {
     pub fn rd_kafka_mock_broker_decommission(
         cluster: *mut rd_kafka_mock_cluster_t,
         broker_id: i32,
-    ) -> c_int;
+    ) -> rd_kafka_resp_err_t;
 }
 extern "C" {
     pub fn rd_kafka_mock_broker_add(