diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 21242d61..31e2a8ae 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -136,7 +136,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby_version: ["3.1.3"]
+        ruby_version: ["3.2.2"]
         sys:
           - os: ubuntu-latest
             rust_toolchain: stable
diff --git a/crates/rb-sys-build/src/bindings.rs b/crates/rb-sys-build/src/bindings.rs
index b310e4b0..5a7abca9 100644
--- a/crates/rb-sys-build/src/bindings.rs
+++ b/crates/rb-sys-build/src/bindings.rs
@@ -49,7 +49,7 @@ pub fn generate(
         .blocklist_item("ruby_abi_version")
         .blocklist_function("^__.*")
         .blocklist_item("RData")
-        .parse_callbacks(Box::new(bindgen::CargoCallbacks));
+        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()));
 
     let bindings = if cfg!(feature = "bindgen-rbimpls") {
         bindings
@@ -143,7 +143,7 @@ fn default_bindgen(clang_args: Vec<String>) -> bindgen::Builder {
         .merge_extern_blocks(true)
         .size_t_is_usize(env::var("CARGO_FEATURE_BINDGEN_SIZE_T_IS_USIZE").is_ok())
         .impl_debug(cfg!(feature = "bindgen-impl-debug"))
-        .parse_callbacks(Box::new(bindgen::CargoCallbacks));
+        .parse_callbacks(Box::new(bindgen::CargoCallbacks::new()));
 
     if env::var("CARGO_FEATURE_BINDGEN_ENABLE_FUNCTION_ATTRIBUTE_DETECTION").is_ok() {
         bindings.enable_function_attribute_detection()
diff --git a/crates/rb-sys-tests/src/memory_test.rs b/crates/rb-sys-tests/src/memory_test.rs
index 6bec95ee..68df4695 100644
--- a/crates/rb-sys-tests/src/memory_test.rs
+++ b/crates/rb-sys-tests/src/memory_test.rs
@@ -11,9 +11,9 @@ fn test_rb_gc_guarded_ptr_basic() {
         let mut string = rb_str_cat_cstr(t, sptr);
         let result = rstring_to_string!(string);
 
-        rb_gc_guard!(s);
-        rb_gc_guard!(t);
-        rb_gc_guard!(string);
+        let _ = rb_gc_guard!(s);
+        let _ = rb_gc_guard!(t);
+        let _ = rb_gc_guard!(string);
 
         assert_eq!("hello, world", result);
     }
@@ -41,11 +41,11 @@ fn test_rb_gc_guarded_ptr_vec() {
             let mut inspected = rb_sys::rb_inspect(rarray);
             let result = rstring_to_string!(inspected);
 
-            rb_gc_guard!(s1);
-            rb_gc_guard!(s2);
-            rb_gc_guard!(s3);
-            rb_gc_guard!(rarray);
-            rb_gc_guard!(inspected);
+            let _ = rb_gc_guard!(s1);
+            let _ = rb_gc_guard!(s2);
+            let _ = rb_gc_guard!(s3);
+            let _ = rb_gc_guard!(rarray);
+            let _ = rb_gc_guard!(inspected);
 
             assert_eq!(
                 result,
diff --git a/examples/rust_reverse/ext/rust_reverse/Cargo.lock b/examples/rust_reverse/ext/rust_reverse/Cargo.lock
index 2668ddca..f0309b78 100644
--- a/examples/rust_reverse/ext/rust_reverse/Cargo.lock
+++ b/examples/rust_reverse/ext/rust_reverse/Cargo.lock
@@ -13,9 +13,9 @@ dependencies = [
 
 [[package]]
 name = "bindgen"
-version = "0.66.1"
+version = "0.69.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f2b84e06fc203107bfbad243f4aba2af864eb7db3b1cf46ea0a023b0b433d2a7"
+checksum = "9ffcebc3849946a7170a05992aac39da343a90676ab392c51a4280981d6379c2"
 dependencies = [
  "bitflags",
  "cexpr",