diff --git a/nix/sources.json b/nix/sources.json
index 8e21c1c..afe4aaa 100644
--- a/nix/sources.json
+++ b/nix/sources.json
@@ -5,10 +5,10 @@
         "homepage": "https://github.com/nmattia/niv",
         "owner": "nmattia",
         "repo": "niv",
-        "rev": "723f0eeb969a730db3c30f977c2b66b9dce9fe4a",
-        "sha256": "0016l7230gd2kdh0g2w573r9a2krqb7x4ifcjhhsn4h1bwap7qr0",
+        "rev": "d67c25f29716fd2087e71352783fcce194303a9a",
+        "sha256": "1813r42sz4pmv1syn38s281lmg2l7h779q4r33nn5azm7wy45yrh",
         "type": "tarball",
-        "url": "https://github.com/nmattia/niv/archive/723f0eeb969a730db3c30f977c2b66b9dce9fe4a.tar.gz",
+        "url": "https://github.com/nmattia/niv/archive/d67c25f29716fd2087e71352783fcce194303a9a.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     },
     "nixpkgs": {
@@ -29,10 +29,10 @@
         "homepage": "",
         "owner": "oxalica",
         "repo": "rust-overlay",
-        "rev": "7c94410d52d4e8bd72803fc1fe6c51fe179edaf5",
-        "sha256": "1m4awxwvmwmv61fpl9jwfg2ka241hwl37rqffw6lpqb8rj3safff",
+        "rev": "e86c0fb5d3a22a5f30d7f64ecad88643fe26449d",
+        "sha256": "138pmz1ypw5j34bywfaffxkffsgfmd0s6889bdc69356cp11zvlm",
         "type": "tarball",
-        "url": "https://github.com/oxalica/rust-overlay/archive/7c94410d52d4e8bd72803fc1fe6c51fe179edaf5.tar.gz",
+        "url": "https://github.com/oxalica/rust-overlay/archive/e86c0fb5d3a22a5f30d7f64ecad88643fe26449d.tar.gz",
         "url_template": "https://github.com/<owner>/<repo>/archive/<rev>.tar.gz"
     }
 }
diff --git a/radicle-surf/src/stats.rs b/radicle-surf/src/stats.rs
index f9dd7e1..312ca8e 100644
--- a/radicle-surf/src/stats.rs
+++ b/radicle-surf/src/stats.rs
@@ -15,8 +15,6 @@
 // You should have received a copy of the GNU General Public License
 // along with this program. If not, see <https://www.gnu.org/licenses/>.
 
-pub use radicle_git_ext::Oid;
-
 #[cfg(feature = "serde")]
 use serde::Serialize;
 
diff --git a/radicle-surf/t/src/diff.rs b/radicle-surf/t/src/diff.rs
index a52fc95..2de12a6 100644
--- a/radicle-surf/t/src/diff.rs
+++ b/radicle-surf/t/src/diff.rs
@@ -129,7 +129,7 @@ fn test_diff() -> Result<(), Error> {
     let repo = Repository::open(GIT_PLATINUM)?;
     let oid = "80bacafba303bf0cdf6142921f430ff265f25095";
     let commit = repo.commit(oid).unwrap();
-    let parent_oid = commit.parents.get(0).unwrap();
+    let parent_oid = commit.parents.first().unwrap();
     let diff = repo.diff(*parent_oid, oid)?;
 
     let expected_files = vec![FileDiff::Modified(Modified {