diff --git a/Cargo.lock b/Cargo.lock
index 585a6e904b..c3086df73e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -479,7 +479,7 @@ checksum = "1171693293099992e19cddea4e8b849964e9846f4acee11b3948bcc337be8776"
 
 [[package]]
 name = "libgit2-sys"
-version = "0.18.4+1.9.3"
+version = "0.18.5+1.9.4"
 dependencies = [
  "cc",
  "libc",
diff --git a/Cargo.toml b/Cargo.toml
index 7df32eacfa..6d71da6e88 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -20,7 +20,7 @@ url = { version = "2.5.4", optional = true }
 bitflags = "2.1.0"
 libc = "0.2"
 log = "0.4.8"
-libgit2-sys = { path = "libgit2-sys", version = "0.18.4" }
+libgit2-sys = { path = "libgit2-sys", version = "0.18.5" }
 
 [target."cfg(all(unix, not(target_os = \"macos\")))".dependencies]
 openssl-sys = { version = "0.9.45", optional = true }
diff --git a/libgit2-sys/CHANGELOG.md b/libgit2-sys/CHANGELOG.md
index ea309fc5b9..9a82f1b799 100644
--- a/libgit2-sys/CHANGELOG.md
+++ b/libgit2-sys/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## 0.18.5+1.9.4 - 2026-05-23
+[0.18.4...0.18.5](https://github.com/rust-lang/git2-rs/compare/libgit2-sys-0.18.4+1.9.3...libgit2-sys-0.18.5+1.9.4)
+
+### Changed
+- Updated to libgit2 [1.9.4](https://github.com/libgit2/libgit2/releases/tag/v1.9.4)
+  [#1260](https://github.com/rust-lang/git2-rs/pull/1260)
+
 ## 0.18.4+1.9.3 - 2026-05-07
 [0.18.3...0.18.4](https://github.com/rust-lang/git2-rs/compare/libgit2-sys-0.18.3+1.9.2...libgit2-sys-0.18.4+1.9.3)
 
diff --git a/libgit2-sys/Cargo.toml b/libgit2-sys/Cargo.toml
index fef7805729..7dec66f2d4 100644
--- a/libgit2-sys/Cargo.toml
+++ b/libgit2-sys/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "libgit2-sys"
-version = "0.18.4+1.9.3"
+version = "0.18.5+1.9.4"
 authors = ["Josh Triplett <josh@joshtriplett.org>", "Alex Crichton <alex@alexcrichton.com>"]
 links = "git2"
 build = "build.rs"
diff --git a/libgit2-sys/build.rs b/libgit2-sys/build.rs
index b45118c9b5..8407f114b7 100644
--- a/libgit2-sys/build.rs
+++ b/libgit2-sys/build.rs
@@ -9,7 +9,7 @@ fn try_system_libgit2(
     experimental_sha256: bool,
 ) -> Result<pkg_config::Library, Box<dyn std::error::Error>> {
     let mut cfg = pkg_config::Config::new();
-    let range_version = "1.9.3".."1.10.0";
+    let range_version = "1.9.4".."1.10.0";
 
     let lib = if experimental_sha256 {
         // Determine whether experimental SHA256 object support is enabled.
diff --git a/libgit2-sys/libgit2 b/libgit2-sys/libgit2
index 1affb8b193..f7164261c9 160000
--- a/libgit2-sys/libgit2
+++ b/libgit2-sys/libgit2
@@ -1 +1 @@
-Subproject commit 1affb8b19346c4f90e163a9a0364959ff1410f64
+Subproject commit f7164261c9bc0a7e0ebf767c584e5192810a8b24
diff --git a/tests/add_extensions.rs b/tests/add_extensions.rs
index 3cafa60eef..bf14a25cd7 100644
--- a/tests/add_extensions.rs
+++ b/tests/add_extensions.rs
@@ -22,6 +22,8 @@ fn test_add_extensions() -> Result<(), Error> {
             Some("objectformat"),
             // The preciousobjects extension was added in 1.9
             Some("preciousobjects"),
+            // The relativeworktrees extension was added in 1.9.4
+            Some("relativeworktrees"),
             // The worktreeconfig extension was added in 1.8
             Some("worktreeconfig")
         ]
diff --git a/tests/get_extensions.rs b/tests/get_extensions.rs
index db8e456a85..731d98781a 100644
--- a/tests/get_extensions.rs
+++ b/tests/get_extensions.rs
@@ -17,6 +17,8 @@ fn test_get_extensions() -> Result<(), Error> {
             Some("objectformat"),
             // The preciousobjects extension was added in 1.9
             Some("preciousobjects"),
+            // The relativeworktrees extension was added in 1.9.4
+            Some("relativeworktrees"),
             // The worktreeconfig extension was added in 1.8
             Some("worktreeconfig")
         ]
diff --git a/tests/remove_extensions.rs b/tests/remove_extensions.rs
index 5a3e21d170..422cdf6a3c 100644
--- a/tests/remove_extensions.rs
+++ b/tests/remove_extensions.rs
@@ -12,6 +12,7 @@ fn test_remove_extensions() -> Result<(), Error> {
             "!noop",
             "!objectformat",
             "!preciousobjects",
+            "!relativeworktrees",
             "!worktreeconfig",
             "other",
         ])?;