diff --git a/.gitignore b/.gitignore
index e39a270..eaebc80 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,5 @@
 /target
-
+*.hdt 
 *.hdt.index.v1-1
 *.hdt.index.v1-rust-cache
 tests/resources/taxonomy-nodes.nq
diff --git a/Cargo.lock b/Cargo.lock
index 5f08570..e47e8f8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -522,6 +522,12 @@ dependencies = [
  "syn 2.0.100",
 ]
 
+[[package]]
+name = "equivalent"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "877a4ace8713b0bcf2a4e7eec82529c029f1d0619886d18145fea96c3ffe5c0f"
+
 [[package]]
 name = "errno"
 version = "0.3.10"
@@ -670,6 +676,12 @@ dependencies = [
  "crunchy",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.15.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5971ac85611da7067dbfcabef3c70ebb5606018acd9e2a3903a0da507521e0d5"
+
 [[package]]
 name = "hdt"
 version = "0.3.0"
@@ -706,6 +718,15 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b07f60793ff0a4d9cef0f18e63b5357e06209987153a64648c972c1e5aff336f"
 
+[[package]]
+name = "home"
+version = "0.5.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "589533453244b0995c858700322199b2becb13b627df2851f64a2775d024abcf"
+dependencies = [
+ "windows-sys",
+]
+
 [[package]]
 name = "iana-time-zone"
 version = "0.1.62"
@@ -736,6 +757,16 @@ version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ce23b50ad8242c51a442f3ff322d56b02f08852c77e4c0b4d3fd684abc89c683"
 
+[[package]]
+name = "indexmap"
+version = "2.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fe4cd85333e22411419a0bcae1297d25e58c9443848b11dc6a86fefe8c78a661"
+dependencies = [
+ "equivalent",
+ "hashbrown",
+]
+
 [[package]]
 name = "indoc"
 version = "2.0.6"
@@ -851,6 +882,12 @@ version = "0.2.171"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c19937216e9d3aa9956d9bb8dfc0b0c8beb6058fc4f7a4dc4d850edf86a237d6"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.4.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d26c52dbd32dccf2d10cac7725f8eae5296885fb5703b261f7d0a0739ec807ab"
+
 [[package]]
 name = "linux-raw-sys"
 version = "0.9.3"
@@ -1034,29 +1071,6 @@ dependencies = [
  "thiserror 2.0.12",
 ]
 
-[[package]]
-name = "parking_lot"
-version = "0.12.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1bf18183cf54e8d6059647fc3063646a1801cf30896933ec2311622cc4b9a27"
-dependencies = [
- "lock_api",
- "parking_lot_core",
-]
-
-[[package]]
-name = "parking_lot_core"
-version = "0.9.10"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e401f977ab385c9e4e3ab30627d6f26d00e2c73eef317493c4ec6d468726cf8"
-dependencies = [
- "cfg-if",
- "libc",
- "redox_syscall",
- "smallvec",
- "windows-targets",
-]
-
 [[package]]
 name = "pct-str"
 version = "2.0.0"
@@ -1133,9 +1147,9 @@ dependencies = [
 
 [[package]]
 name = "pprof"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ebbe2f8898beba44815fdc9e5a4ae9c929e21c5dc29b0c774a15555f7f58d6d0"
+checksum = "38a01da47675efa7673b032bf8efd8214f1917d89685e07e395ab125ea42b187"
 dependencies = [
  "aligned-vec",
  "backtrace",
@@ -1146,13 +1160,13 @@ dependencies = [
  "log",
  "nix",
  "once_cell",
- "parking_lot",
  "protobuf",
- "protobuf-codegen-pure",
+ "protobuf-codegen",
  "smallvec",
+ "spin",
  "symbolic-demangle",
  "tempfile",
- "thiserror 1.0.69",
+ "thiserror 2.0.12",
 ]
 
 [[package]]
@@ -1199,27 +1213,53 @@ dependencies = [
 
 [[package]]
 name = "protobuf"
-version = "2.28.0"
+version = "3.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "106dd99e98437432fed6519dedecfade6a06a73bb7b2a1e019fdd2bee5778d94"
+checksum = "d65a1d4ddae7d8b5de68153b48f6aa3bba8cb002b243dbdbc55a5afbc98f99f4"
+dependencies = [
+ "once_cell",
+ "protobuf-support",
+ "thiserror 1.0.69",
+]
 
 [[package]]
 name = "protobuf-codegen"
-version = "2.28.0"
+version = "3.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "033460afb75cf755fcfc16dfaed20b86468082a2ea24e05ac35ab4a099a017d6"
+checksum = "5d3976825c0014bbd2f3b34f0001876604fe87e0c86cd8fa54251530f1544ace"
 dependencies = [
+ "anyhow",
+ "once_cell",
  "protobuf",
+ "protobuf-parse",
+ "regex",
+ "tempfile",
+ "thiserror 1.0.69",
 ]
 
 [[package]]
-name = "protobuf-codegen-pure"
-version = "2.28.0"
+name = "protobuf-parse"
+version = "3.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "95a29399fc94bcd3eeaa951c715f7bea69409b2445356b00519740bcd6ddd865"
+checksum = "b4aeaa1f2460f1d348eeaeed86aea999ce98c1bded6f089ff8514c9d9dbdc973"
 dependencies = [
+ "anyhow",
+ "indexmap",
+ "log",
  "protobuf",
- "protobuf-codegen",
+ "protobuf-support",
+ "tempfile",
+ "thiserror 1.0.69",
+ "which",
+]
+
+[[package]]
+name = "protobuf-support"
+version = "3.7.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3e36c2f31e0a47f9280fb347ef5e461ffcd2c52dd520d8e216b52f93b0b0d7d6"
+dependencies = [
+ "thiserror 1.0.69",
 ]
 
 [[package]]
@@ -1328,15 +1368,6 @@ dependencies = [
  "walkdir",
 ]
 
-[[package]]
-name = "redox_syscall"
-version = "0.5.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d2f103c6d277498fbceb16e84d317e2a400f160f46904d5f5410848c829511a3"
-dependencies = [
- "bitflags 2.9.0",
-]
-
 [[package]]
 name = "regex"
 version = "1.11.1"
@@ -1395,6 +1426,19 @@ version = "0.1.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "719b953e2095829ee67db738b3bfa9fa368c94900df327b3f07fe6e794d2fe1f"
 
+[[package]]
+name = "rustix"
+version = "0.38.44"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fdb5bc1ae2baa591800df16c9ca78619bf65c0488b41b96ccec5d11220d8c154"
+dependencies = [
+ "bitflags 2.9.0",
+ "errno",
+ "libc",
+ "linux-raw-sys 0.4.15",
+ "windows-sys",
+]
+
 [[package]]
 name = "rustix"
 version = "1.0.3"
@@ -1404,7 +1448,7 @@ dependencies = [
  "bitflags 2.9.0",
  "errno",
  "libc",
- "linux-raw-sys",
+ "linux-raw-sys 0.9.3",
  "windows-sys",
 ]
 
@@ -1625,6 +1669,15 @@ dependencies = [
  "sophia_rio",
 ]
 
+[[package]]
+name = "spin"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5fe4ccb98d9c292d56fec89a5e07da7fc4cf0dc11e156b41793132775d3e591"
+dependencies = [
+ "lock_api",
+]
+
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.0"
@@ -1720,7 +1773,7 @@ dependencies = [
  "fastrand",
  "getrandom 0.3.2",
  "once_cell",
- "rustix",
+ "rustix 1.0.3",
  "windows-sys",
 ]
 
@@ -1913,6 +1966,18 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "which"
+version = "4.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87ba24419a2078cd2b0f2ede2691b6c66d8e47836da3b6db8265ebad47afbfc7"
+dependencies = [
+ "either",
+ "home",
+ "once_cell",
+ "rustix 0.38.44",
+]
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
diff --git a/Cargo.toml b/Cargo.toml
index 0cb7cc8..c4292cd 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -29,7 +29,7 @@ tempfile = "3.19"
 
 [dev-dependencies]
 criterion = { version = "0.5", features = ["async_tokio"]}
-pprof = { version = "0.14", features = ["protobuf", "protobuf-codec", "criterion"] }
+pprof = { version = "0.15", features = ["protobuf", "protobuf-codec", "criterion"] }
 walkdir = "2.5"
 
 [package.metadata.cargo-machete]
diff --git a/src/builder.rs b/src/builder.rs
index 327ba2b..6a36daf 100644
--- a/src/builder.rs
+++ b/src/builder.rs
@@ -331,7 +331,7 @@ mod tests {
         let hdt_reader = BufReader::new(source);
         let h = Hdt::new(hdt_reader).expect("failed to load HDT file");
         let t: Vec<(Arc<str>, Arc<str>, Arc<str>)> = h.triples().collect();
-        println!("{:?}", t);
+        println!("{t:?}");
         assert_eq!(t.len(), 9);
 
         // http://example.org/apple#Apple,http://example.org/apple#color,Red
diff --git a/src/dictionary.rs b/src/dictionary.rs
index e397bb7..515ed06 100644
--- a/src/dictionary.rs
+++ b/src/dictionary.rs
@@ -64,7 +64,7 @@ impl FourSectDictBuilder {
         let source = match std::fs::File::open(nt_file) {
             Ok(f) => f,
             Err(e) => {
-                error!("Error opening file {:?}: {:?}", nt_file, e);
+                error!("Error opening file {nt_file:?}: {e:?}");
                 return Err(e.into());
             }
         };
@@ -145,7 +145,7 @@ impl FourSectDictBuilder {
         let source = match std::fs::File::open(nt_file) {
             Ok(f) => f,
             Err(e) => {
-                error!("Error opening file {:?}: {:?}", nt_file, e);
+                error!("Error opening file {nt_file:?}: {e:?}");
                 return Err(e.into());
             }
         };
diff --git a/src/main.rs b/src/main.rs
index 98e5052..cc0d076 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -96,7 +96,7 @@ fn main() {
                 },
             ) {
                 Ok(_) => {}
-                Err(e) => eprintln!("Error writing: {}", e),
+                Err(e) => eprintln!("Error writing: {e}"),
             }
         }
         None => {}
diff --git a/src/rdf_reader.rs b/src/rdf_reader.rs
index fb9e764..d855f2f 100644
--- a/src/rdf_reader.rs
+++ b/src/rdf_reader.rs
@@ -23,7 +23,7 @@ pub fn convert_to_nt(
         let source = match std::fs::File::open(&file) {
             Ok(f) => f,
             Err(e) => {
-                error!("Error opening file {:?}: {:?}", file, e);
+                error!("Error opening file {file:?}: {e:?}");
                 return Err(e.into());
             }
         };