diff --git a/rust/Cargo.toml b/rust/Cargo.toml
index b7b909e..504f365 100644
--- a/rust/Cargo.toml
+++ b/rust/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tantivy-go"
-version = "0.1.0"
+version = "0.2.0"
 edition = "2021"
 build = "src/build.rs"
 
@@ -8,11 +8,11 @@ build = "src/build.rs"
 crate-type = ["staticlib"]
 
 [build-dependencies]
-cbindgen = "0.26.0"
+cbindgen = "0.27.0"
 
 [dependencies]
 tantivy = "0.22.0"
-cbindgen = "0.26.0"
+cbindgen = "0.27.0"
 log = "0.4.21"
 base64 = "0.22.1"
 env_logger = "0.11.3"
diff --git a/rust/Makefile b/rust/Makefile
index 801be38..2100707 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -14,8 +14,9 @@ setup:
 	@rustup target add x86_64-apple-darwin
 	@rustup target add x86_64-pc-windows-gnu
 
+# strange SIGSEGV at higher levels of optimization
 build-linux-amd64-musl:
-	env TARGET_CC=x86_64-linux-musl-gcc cargo build --release --target x86_64-unknown-linux-musl
+	env TARGET_CC=x86_64-linux-musl-gcc RUSTFLAGS='-C opt-level=1' cargo build --release --target x86_64-unknown-linux-musl
 
 install-linux-amd64-musl: build-linux-amd64-musl
 	@mkdir -p ../libs/linux-amd64-musl
diff --git a/typedef_unix32.go b/typedef_unix32.go
index b392a9f..697518e 100644
--- a/typedef_unix32.go
+++ b/typedef_unix32.go
@@ -5,4 +5,3 @@ package tantivy_go
 import "C"
 
 type pointerCType = C.uint
-type pointerGoType = uint64
diff --git a/typedef_unix64.go b/typedef_unix64.go
index 980ed4f..0769d86 100644
--- a/typedef_unix64.go
+++ b/typedef_unix64.go
@@ -5,4 +5,3 @@ package tantivy_go
 import "C"
 
 type pointerCType = C.ulong
-type pointerGoType = uint64
diff --git a/typedef_win64.go b/typedef_win64.go
index cf61d5a..f5c7031 100644
--- a/typedef_win64.go
+++ b/typedef_win64.go
@@ -5,4 +5,3 @@ package tantivy_go
 import "C"
 
 type pointerCType = C.ulonglong
-type pointerGoType = uint64