diff --git a/Cargo.toml b/Cargo.toml
index 02e6c23c..7fcb62d9 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -2,9 +2,9 @@
 name = "zmq"
 version = "0.10.0"
 authors = [
-    "a.rottmann@gmx.at",
-    "erick.tryzelaar@gmail.com",
-    "opensource@traversersearch.nl",
+  "a.rottmann@gmx.at",
+  "erick.tryzelaar@gmail.com",
+  "opensource@traversersearch.nl",
 ]
 license = "MIT/Apache-2.0"
 description = "High-level bindings to the zeromq library"
@@ -26,14 +26,14 @@ default = ["zmq_has"]
 zmq_has = []
 
 [dependencies]
-bitflags = "1.0"
+bitflags = "2.4"
 libc = "0.2.15"
 zmq-sys = { version = "0.12.0", path = "zmq-sys" }
 
 [dev-dependencies]
 trybuild = { version = "1" }
-env_logger = { version = "0.9", default-features = false }
-log = "0.4.3"
+env_logger = { version = "0.10", default-features = false }
+log = "0.4"
 nix = "0.23"
 quickcheck = "1"
 rand = "0.8"
@@ -157,17 +157,17 @@ name = "psenvpub"
 path = "examples/zguide/psenvpub/main.rs"
 
 [[example]]
-name="psenvsub"
-path="examples/zguide/psenvsub/main.rs"
+name = "psenvsub"
+path = "examples/zguide/psenvsub/main.rs"
 
 [[example]]
-name="rtreq"
-path="examples/zguide/rtreq/main.rs"
+name = "rtreq"
+path = "examples/zguide/rtreq/main.rs"
 
 [[example]]
-name="lbbroker"
-path="examples/zguide/lbbroker/main.rs"
+name = "lbbroker"
+path = "examples/zguide/lbbroker/main.rs"
 
 [[example]]
-name="asyncsrv"
-path="examples/zguide/asyncsrv/main.rs"
+name = "asyncsrv"
+path = "examples/zguide/asyncsrv/main.rs"
diff --git a/src/lib.rs b/src/lib.rs
index 17dc0ccd..bfbe89e6 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -371,7 +371,7 @@ pub fn version() -> (i32, i32, i32) {
         zmq_sys::zmq_version(&mut major, &mut minor, &mut patch);
     }
 
-    (major as i32, minor as i32, patch as i32)
+    (major, minor, patch)
 }
 
 struct RawContext {
@@ -1016,6 +1016,7 @@ impl Socket {
 // is unfortunate.
 bitflags! {
     /// Type representing pending socket events.
+    #[derive(Debug, PartialEq, Clone, Copy)]
     pub struct PollEvents: i16 {
         /// For `poll()`, specifies to signal when a message/some data
         /// can be read from a socket.
diff --git a/tests/compile-fail/no-leaking-poll-items.stderr b/tests/compile-fail/no-leaking-poll-items.stderr
index 6a1692a7..ff8a39a7 100644
--- a/tests/compile-fail/no-leaking-poll-items.stderr
+++ b/tests/compile-fail/no-leaking-poll-items.stderr
@@ -4,7 +4,8 @@ error[E0597]: `socket` does not live long enough
 3 |     let _poll_item = {
   |         ---------- borrow later stored here
 4 |         let socket = context.socket(zmq::PAIR).unwrap();
+  |             ------ binding `socket` declared here
 5 |         socket.as_poll_item(zmq::POLLIN)
-  |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ borrowed value does not live long enough
+  |         ^^^^^^ borrowed value does not live long enough
 6 |     }; //~^ ERROR `socket` does not live long enough [E0597]
   |     - `socket` dropped here while still borrowed
diff --git a/tests/compile-fail/socket-thread-unsafe.stderr b/tests/compile-fail/socket-thread-unsafe.stderr
index 9f5982b9..78ffa177 100644
--- a/tests/compile-fail/socket-thread-unsafe.stderr
+++ b/tests/compile-fail/socket-thread-unsafe.stderr
@@ -1,18 +1,31 @@
 error[E0277]: `*mut c_void` cannot be shared between threads safely
-  --> tests/compile-fail/socket-thread-unsafe.rs:13:13
+  --> tests/compile-fail/socket-thread-unsafe.rs:13:27
    |
-13 |     let t = thread::spawn(move || {
-   |             ^^^^^^^^^^^^^ `*mut c_void` cannot be shared between threads safely
+13 |       let t = thread::spawn(move || {
+   |  _____________-------------_^
+   | |             |
+   | |             required by a bound introduced by this call
+14 | |         t!(s.bind("tcp://127.0.0.1:12345"))
+15 | |     });
+   | |_____^ `*mut c_void` cannot be shared between threads safely
    |
    = help: within `Socket`, the trait `Sync` is not implemented for `*mut c_void`
-   = note: required because it appears within the type `Socket`
-   = note: required because of the requirements on the impl of `Send` for `&Socket`
+note: required because it appears within the type `Socket`
+  --> src/lib.rs
+   |
+   | pub struct Socket {
+   |            ^^^^^^
+   = note: required for `&Socket` to implement `Send`
 note: required because it's used within this closure
   --> tests/compile-fail/socket-thread-unsafe.rs:13:27
    |
-13 |       let t = thread::spawn(move || {
-   |  ___________________________^
-14 | |         t!(s.bind("tcp://127.0.0.1:12345"))
-15 | |     });
-   | |_____^
+13 |     let t = thread::spawn(move || {
+   |                           ^^^^^^^
 note: required by a bound in `spawn`
+  --> $RUST/std/src/thread/mod.rs
+   |
+   | pub fn spawn<F, T>(f: F) -> JoinHandle<T>
+   |        ----- required by a bound in this function
+...
+   |     F: Send + 'static,
+   |        ^^^^ required by this bound in `spawn`
diff --git a/zmq-sys/Cargo.toml b/zmq-sys/Cargo.toml
index 14507b86..84ae0fe5 100644
--- a/zmq-sys/Cargo.toml
+++ b/zmq-sys/Cargo.toml
@@ -1,10 +1,7 @@
 [package]
 name = "zmq-sys"
 version = "0.12.0"
-authors = [
-    "a.rottmann@gmx.at",
-    "erick.tryzelaar@gmail.com",
-]
+authors = ["a.rottmann@gmx.at", "erick.tryzelaar@gmail.com"]
 license = "MIT/Apache-2.0"
 description = "Low-level bindings to the zeromq library"
 keywords = ["ffi", "bindings"]
@@ -20,7 +17,7 @@ libc = "0.2.15"
 
 [build-dependencies]
 system-deps = "6"
-zeromq-src = { version = "0.2.1" }
+zeromq-src = { version = "0.3.1" }
 
 [package.metadata.system-deps]
 libzmq = "4.1"