diff --git a/changelog.md b/changelog.md
index d7fc7a061..6a1f566e2 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,21 @@
 # Changelog
 
+See also the [rdkafka-sys changelog](rdkafka-sys/changelog.md).
+
+<a name="0.24.0"></a>
+## 0.24.0 (Unreleased)
+
+* Decouple versioning of rdkafka-sys from rdkafka. rdkafka-sys now has its
+  own [changelog](rdkafka-sys/changelog.md) and will follow SemVer conventions.
+  ([#211])
+
+[#211]: https://github.com/fede1024/rust-rdkafka/issues/211
+
+<a name="0.23.1"></a>
+## 0.23.1 (2020-01-13)
+
+* Fix build on docs.rs.
+
 <a name="0.23.0"></a>
 ## 0.23.0 (2019-12-31)
 
diff --git a/rdkafka-sys/Cargo.toml b/rdkafka-sys/Cargo.toml
index 048ce8889..f7d91c24e 100644
--- a/rdkafka-sys/Cargo.toml
+++ b/rdkafka-sys/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rdkafka-sys"
-version = "1.3.1"
+version = "1.4.0+1.4.0"
 authors = ["Federico Giraud <giraud.federico@gmail.com>"]
 build = "build.rs"
 links = "rdkafka"
diff --git a/rdkafka-sys/README.md b/rdkafka-sys/README.md
index 5c1c06285..9fa75fa12 100644
--- a/rdkafka-sys/README.md
+++ b/rdkafka-sys/README.md
@@ -14,9 +14,12 @@ cargo install bindgen
 
 ## Version
 
-The rdkafka-sys version number is in the format `X.Y.Z-P`, where `X.Y.Z`
-corresponds to the librdkafka version, and `P` indicates the version of the
-rust bindings.
+The rdkafka-sys version number is in the format `X.Y.Z+RX.RY.RZ`, where `X.Y.Z`
+is the version of this crate and follows SemVer conventions, while `RX.RY.RZ`
+is the version of the bundled librdkafka.
+
+Note that versions before v1.4.0+1.4.0 did not follow this convention, and
+instead directly corresponded to the bundled librdkafka version.
 
 ## Build
 
diff --git a/rdkafka-sys/build.rs b/rdkafka-sys/build.rs
index cd6260696..78f91835c 100644
--- a/rdkafka-sys/build.rs
+++ b/rdkafka-sys/build.rs
@@ -193,7 +193,9 @@ fn build_librdkafka() {
         // want a stable location that we can add to the linker search path.
         // Since we're not actually installing to /usr or /usr/local, there's no
         // harm to always using "lib" here.
-        .define("CMAKE_INSTALL_LIBDIR", "lib");
+        .define("CMAKE_INSTALL_LIBDIR", "lib")
+        // Workaround for https://github.com/edenhill/librdkafka/pull/2640.
+        .define("ENABLE_DEVEL", "0");
 
     if env::var("CARGO_FEATURE_LIBZ").is_ok() {
         config.define("WITH_ZLIB", "1");
diff --git a/rdkafka-sys/changelog.md b/rdkafka-sys/changelog.md
new file mode 100644
index 000000000..ea1558c28
--- /dev/null
+++ b/rdkafka-sys/changelog.md
@@ -0,0 +1,8 @@
+# Changelog
+
+<a name="1.4.0+1.4.0"></a>
+## v1.4.0+1.4.0 (Unreleased)
+
+* Upgrade to librdkafka v1.4.0.
+
+* Start separate changelog for rdkafka-sys.
\ No newline at end of file
diff --git a/rdkafka-sys/librdkafka b/rdkafka-sys/librdkafka
index 4ffe54b4f..e4a8c0f62 160000
--- a/rdkafka-sys/librdkafka
+++ b/rdkafka-sys/librdkafka
@@ -1 +1 @@
-Subproject commit 4ffe54b4f59ee5ae3767f9f25dc14651a3384d62
+Subproject commit e4a8c0f62742789bd4d62accd1497c82c08c4259
diff --git a/rdkafka-sys/src/bindings.rs b/rdkafka-sys/src/bindings.rs
index 15610bcde..485184c7e 100644
--- a/rdkafka-sys/src/bindings.rs
+++ b/rdkafka-sys/src/bindings.rs
@@ -4,7 +4,7 @@ use num_enum::TryFromPrimitive;
 type FILE = libc::FILE;
 type sockaddr = libc::sockaddr;
 
-pub const RD_KAFKA_VERSION: u32 = 16974079;
+pub const RD_KAFKA_VERSION: u32 = 17039615;
 pub const RD_KAFKA_DEBUG_CONTEXTS : & 'static [ u8 ; 124usize ] = b"all,generic,broker,topic,metadata,feature,queue,msg,protocol,cgrp,security,fetch,interceptor,plugin,consumer,admin,eos,mock\0" ;
 pub const RD_KAFKA_DESTROY_F_NO_CONSUMER_CLOSE: u32 = 8;
 pub const RD_KAFKA_OFFSET_BEGINNING: i32 = -2;
@@ -97,6 +97,18 @@ pub struct rd_kafka_topic_result_s {
     _unused: [u8; 0],
 }
 pub type rd_kafka_topic_result_t = rd_kafka_topic_result_s;
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct rd_kafka_consumer_group_metadata_s {
+    _unused: [u8; 0],
+}
+pub type rd_kafka_consumer_group_metadata_t = rd_kafka_consumer_group_metadata_s;
+#[repr(C)]
+#[derive(Debug, Copy, Clone)]
+pub struct rd_kafka_error_s {
+    _unused: [u8; 0],
+}
+pub type rd_kafka_error_t = rd_kafka_error_s;
 #[repr(i32)]
 #[derive(Debug, Copy, Clone, PartialEq, Eq, Hash, TryFromPrimitive)]
 pub enum rd_kafka_resp_err_t {
@@ -155,6 +167,9 @@ pub enum rd_kafka_resp_err_t {
     RD_KAFKA_RESP_ERR__GAPLESS_GUARANTEE = -148,
     RD_KAFKA_RESP_ERR__MAX_POLL_EXCEEDED = -147,
     RD_KAFKA_RESP_ERR__UNKNOWN_BROKER = -146,
+    RD_KAFKA_RESP_ERR__NOT_CONFIGURED = -145,
+    RD_KAFKA_RESP_ERR__FENCED = -144,
+    RD_KAFKA_RESP_ERR__APPLICATION = -143,
     RD_KAFKA_RESP_ERR__END = -100,
     RD_KAFKA_RESP_ERR_UNKNOWN = -1,
     RD_KAFKA_RESP_ERR_NO_ERROR = 0,
@@ -239,7 +254,8 @@ pub enum rd_kafka_resp_err_t {
     RD_KAFKA_RESP_ERR_MEMBER_ID_REQUIRED = 79,
     RD_KAFKA_RESP_ERR_PREFERRED_LEADER_NOT_AVAILABLE = 80,
     RD_KAFKA_RESP_ERR_GROUP_MAX_SIZE_REACHED = 81,
-    RD_KAFKA_RESP_ERR_END_ALL = 82,
+    RD_KAFKA_RESP_ERR_FENCED_INSTANCE_ID = 82,
+    RD_KAFKA_RESP_ERR_END_ALL = 83,
 }
 #[repr(C)]
 #[derive(Debug, Copy, Clone)]
@@ -280,6 +296,36 @@ extern "C" {
         reason: *const ::std::os::raw::c_char,
     ) -> rd_kafka_resp_err_t;
 }
+extern "C" {
+    pub fn rd_kafka_error_code(error: *const rd_kafka_error_t) -> rd_kafka_resp_err_t;
+}
+extern "C" {
+    pub fn rd_kafka_error_name(error: *const rd_kafka_error_t) -> *const ::std::os::raw::c_char;
+}
+extern "C" {
+    pub fn rd_kafka_error_string(error: *const rd_kafka_error_t) -> *const ::std::os::raw::c_char;
+}
+extern "C" {
+    pub fn rd_kafka_error_is_fatal(error: *const rd_kafka_error_t) -> ::std::os::raw::c_int;
+}
+extern "C" {
+    pub fn rd_kafka_error_is_retriable(error: *const rd_kafka_error_t) -> ::std::os::raw::c_int;
+}
+extern "C" {
+    pub fn rd_kafka_error_txn_requires_abort(
+        error: *const rd_kafka_error_t,
+    ) -> ::std::os::raw::c_int;
+}
+extern "C" {
+    pub fn rd_kafka_error_destroy(error: *mut rd_kafka_error_t);
+}
+extern "C" {
+    pub fn rd_kafka_error_new(
+        code: rd_kafka_resp_err_t,
+        fmt: *const ::std::os::raw::c_char,
+        ...
+    ) -> *mut rd_kafka_error_t;
+}
 #[repr(C)]
 pub struct rd_kafka_topic_partition_s {
     pub topic: *mut ::std::os::raw::c_char,
@@ -922,6 +968,26 @@ extern "C" {
         msg_opaque: *mut ::std::os::raw::c_void,
     ) -> i32;
 }
+extern "C" {
+    pub fn rd_kafka_msg_partitioner_fnv1a(
+        rkt: *const rd_kafka_topic_t,
+        key: *const ::std::os::raw::c_void,
+        keylen: usize,
+        partition_cnt: i32,
+        rkt_opaque: *mut ::std::os::raw::c_void,
+        msg_opaque: *mut ::std::os::raw::c_void,
+    ) -> i32;
+}
+extern "C" {
+    pub fn rd_kafka_msg_partitioner_fnv1a_random(
+        rkt: *const rd_kafka_topic_t,
+        key: *const ::std::os::raw::c_void,
+        keylen: usize,
+        partition_cnt: i32,
+        rkt_opaque: *mut ::std::os::raw::c_void,
+        msg_opaque: *mut ::std::os::raw::c_void,
+    ) -> i32;
+}
 extern "C" {
     pub fn rd_kafka_new(
         type_: rd_kafka_type_t,
@@ -1249,6 +1315,33 @@ extern "C" {
         partitions: *mut rd_kafka_topic_partition_list_t,
     ) -> rd_kafka_resp_err_t;
 }
+extern "C" {
+    pub fn rd_kafka_consumer_group_metadata(
+        rk: *mut rd_kafka_t,
+    ) -> *mut rd_kafka_consumer_group_metadata_t;
+}
+extern "C" {
+    pub fn rd_kafka_consumer_group_metadata_new(
+        group_id: *const ::std::os::raw::c_char,
+    ) -> *mut rd_kafka_consumer_group_metadata_t;
+}
+extern "C" {
+    pub fn rd_kafka_consumer_group_metadata_destroy(arg1: *mut rd_kafka_consumer_group_metadata_t);
+}
+extern "C" {
+    pub fn rd_kafka_consumer_group_metadata_write(
+        cgmd: *const rd_kafka_consumer_group_metadata_t,
+        bufferp: *mut *mut ::std::os::raw::c_void,
+        sizep: *mut usize,
+    ) -> *mut rd_kafka_error_t;
+}
+extern "C" {
+    pub fn rd_kafka_consumer_group_metadata_read(
+        cgmdp: *mut *mut rd_kafka_consumer_group_metadata_t,
+        buffer: *const ::std::os::raw::c_void,
+        size: usize,
+    ) -> *mut rd_kafka_error_t;
+}
 extern "C" {
     pub fn rd_kafka_produce(
         rkt: *mut rd_kafka_topic_t,
@@ -2138,3 +2231,32 @@ extern "C" {
         errstr: *const ::std::os::raw::c_char,
     ) -> rd_kafka_resp_err_t;
 }
+extern "C" {
+    pub fn rd_kafka_init_transactions(
+        rk: *mut rd_kafka_t,
+        timeout_ms: ::std::os::raw::c_int,
+    ) -> *mut rd_kafka_error_t;
+}
+extern "C" {
+    pub fn rd_kafka_begin_transaction(rk: *mut rd_kafka_t) -> *mut rd_kafka_error_t;
+}
+extern "C" {
+    pub fn rd_kafka_send_offsets_to_transaction(
+        rk: *mut rd_kafka_t,
+        offsets: *const rd_kafka_topic_partition_list_t,
+        cgmetadata: *const rd_kafka_consumer_group_metadata_t,
+        timeout_ms: ::std::os::raw::c_int,
+    ) -> *mut rd_kafka_error_t;
+}
+extern "C" {
+    pub fn rd_kafka_commit_transaction(
+        rk: *mut rd_kafka_t,
+        timeout_ms: ::std::os::raw::c_int,
+    ) -> *mut rd_kafka_error_t;
+}
+extern "C" {
+    pub fn rd_kafka_abort_transaction(
+        rk: *mut rd_kafka_t,
+        timeout_ms: ::std::os::raw::c_int,
+    ) -> *mut rd_kafka_error_t;
+}
diff --git a/rdkafka-sys/src/helpers.rs b/rdkafka-sys/src/helpers.rs
index 286d3bd82..7154e80f5 100644
--- a/rdkafka-sys/src/helpers.rs
+++ b/rdkafka-sys/src/helpers.rs
@@ -60,6 +60,9 @@ pub fn rd_kafka_resp_err_t_to_rdkafka_error(err: RDKafkaRespErr) -> RDKafkaError
         RD_KAFKA_RESP_ERR__GAPLESS_GUARANTEE => GaplessGuarantee,
         RD_KAFKA_RESP_ERR__MAX_POLL_EXCEEDED => PollExceeded,
         RD_KAFKA_RESP_ERR__UNKNOWN_BROKER => UnknownBroker,
+        RD_KAFKA_RESP_ERR__NOT_CONFIGURED => NotConfigured,
+        RD_KAFKA_RESP_ERR__FENCED => Fenced,
+        RD_KAFKA_RESP_ERR__APPLICATION => Application,
         RD_KAFKA_RESP_ERR__END => End,
         RD_KAFKA_RESP_ERR_UNKNOWN => Unknown,
         RD_KAFKA_RESP_ERR_NO_ERROR => NoError,
@@ -148,6 +151,7 @@ pub fn rd_kafka_resp_err_t_to_rdkafka_error(err: RDKafkaRespErr) -> RDKafkaError
         RD_KAFKA_RESP_ERR_MEMBER_ID_REQUIRED => MemberIdRequired,
         RD_KAFKA_RESP_ERR_PREFERRED_LEADER_NOT_AVAILABLE => PreferredLeaderNotAvailable,
         RD_KAFKA_RESP_ERR_GROUP_MAX_SIZE_REACHED => GroupMaxSizeReached,
+        RD_KAFKA_RESP_ERR_FENCED_INSTANCE_ID => FencedInstanceId,
         RD_KAFKA_RESP_ERR_END_ALL => EndAll,
     }
 }
diff --git a/rdkafka-sys/src/types.rs b/rdkafka-sys/src/types.rs
index 096c3592a..ae93d1e2e 100644
--- a/rdkafka-sys/src/types.rs
+++ b/rdkafka-sys/src/types.rs
@@ -216,6 +216,12 @@ pub enum RDKafkaError {
     PollExceeded = -147,
     /// Unknown broker
     UnknownBroker = -146,
+    /// Functionality not configured
+    NotConfigured,
+    /// Instance has been fenced
+    Fenced,
+    /// Application generated error
+    Application,
     #[doc(hidden)]
     End = -100,
     /// Unknown broker error
@@ -387,6 +393,8 @@ pub enum RDKafkaError {
     PreferredLeaderNotAvailable = 80,
     /// Consumer group has reached maximum size
     GroupMaxSizeReached = 81,
+    /// Static consumer fenced by other consumer with same group.instance.id
+    FencedInstanceId = 82,
     #[doc(hidden)]
     EndAll,
 }