diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 347e8070..026121e6 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -30,12 +30,12 @@ jobs:
         include:
           - build: ubuntu
             os: ubuntu-latest
-            rust: nightly-2024-10-06
+            rust: nightly-2025-01-02
             host_target: x86_64-unknown-linux-gnu
             mustang_target: x86_64-mustang-linux-gnu
           - build: i686-linux
             os: ubuntu-latest
-            rust: nightly-2024-10-06
+            rust: nightly-2025-01-02
             target: i686-unknown-linux-gnu
             gcc_package: gcc-i686-linux-gnu
             gcc: i686-linux-gnu-gcc
@@ -44,7 +44,7 @@ jobs:
             mustang_target: i686-mustang-linux-gnu
           - build: aarch64-linux
             os: ubuntu-latest
-            rust: nightly-2024-10-06
+            rust: nightly-2025-01-02
             target: aarch64-unknown-linux-gnu
             gcc_package: gcc-aarch64-linux-gnu
             gcc: aarch64-linux-gnu-gcc
@@ -54,7 +54,7 @@ jobs:
             mustang_target: aarch64-mustang-linux-gnu
           - build: riscv64-linux
             os: ubuntu-latest
-            rust: nightly-2024-10-06
+            rust: nightly-2025-01-02
             target: riscv64gc-unknown-linux-gnu
             gcc_package: gcc-riscv64-linux-gnu
             gcc: riscv64-linux-gnu-gcc
@@ -138,22 +138,22 @@ jobs:
 
     - name: Install rust-src
       run: |
-        rustup component add rust-src --toolchain nightly-2024-10-06-x86_64-unknown-linux-gnu
+        rustup component add rust-src --toolchain nightly-2025-01-02-x86_64-unknown-linux-gnu
 
     - name: cargo check non-mustang
       run: |
         # Check that the code compiles on non-mustang targets.
-        cargo +nightly-2024-10-06 check --all --target=${{ matrix.host_target }}
+        cargo +nightly-2025-01-02 check --all --target=${{ matrix.host_target }}
 
     - name: cargo test
       run: |
-        cargo +nightly-2024-10-06 test --verbose -Z build-std --target=target-specs/${{ matrix.mustang_target }}.json -- ${{ matrix.test_args }} -- --nocapture
+        cargo +nightly-2025-01-02 test --verbose -Z build-std --target=target-specs/${{ matrix.mustang_target }}.json -- ${{ matrix.test_args }} -- --nocapture
       env:
         RUST_BACKTRACE: 1
 
     - name: cargo test --release
       run: |
-        cargo +nightly-2024-10-06 test --verbose --release -Z build-std --target=target-specs/${{ matrix.mustang_target }}.json  -- ${{ matrix.test_args }}
+        cargo +nightly-2025-01-02 test --verbose --release -Z build-std --target=target-specs/${{ matrix.mustang_target }}.json  -- ${{ matrix.test_args }}
       env:
         RUST_BACKTRACE: 1
 
@@ -181,20 +181,20 @@ jobs:
     - name: test mustang-nostd as program
       working-directory: example-crates/mustang-nostd
       run: |
-        cargo +nightly-2024-10-06 run -Zbuild-std=core,alloc --target=../../target-specs/${{ matrix.mustang_target }}.json
+        cargo +nightly-2025-01-02 run -Zbuild-std=core,alloc --target=../../target-specs/${{ matrix.mustang_target }}.json
       env:
         RUST_BACKTRACE: 1
 
     - name: test mustang-nostd as tests
       working-directory: example-crates/mustang-nostd
       run: |
-        cargo +nightly-2024-10-06 test -Zbuild-std=core,alloc,test,std --target=../../target-specs/${{ matrix.mustang_target }}.json
+        cargo +nightly-2025-01-02 test -Zbuild-std=core,alloc,test,std --target=../../target-specs/${{ matrix.mustang_target }}.json
       env:
         RUST_BACKTRACE: 1
 
     - name: test mustang-custom-allocator as tests
       working-directory: example-crates/mustang-custom-allocator
       run: |
-        cargo +nightly-2024-10-06 run -Zbuild-std --target=../../target-specs/${{ matrix.mustang_target }}.json
+        cargo +nightly-2025-01-02 run -Zbuild-std --target=../../target-specs/${{ matrix.mustang_target }}.json
       env:
         RUST_BACKTRACE: 1
diff --git a/Cargo.toml b/Cargo.toml
index de23e9c7..86907357 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,7 +13,7 @@ exclude = ["/.github", "ci"]
 keywords = ["linux"]
 
 [target.'cfg(target_vendor = "mustang")'.dependencies]
-c-gull = { version = "0.20.3", default-features = false, features = ["take-charge", "call-main", "malloc-via-crates"] }
+c-gull = { version = "0.21.0", default-features = false, features = ["take-charge", "call-main", "malloc-via-crates"] }
 
 [dev-dependencies]
 similar-asserts = "1.1.0"
diff --git a/tests/examples.rs b/tests/examples.rs
index ffbf51b8..5e94dc12 100644
--- a/tests/examples.rs
+++ b/tests/examples.rs
@@ -39,7 +39,7 @@ fn test_example(name: &str, features: &str, stdout: &str, stderr: &str) {
 
     let mut command = Command::new("cargo");
     if which::which("rustup").is_ok() {
-        command.arg("+nightly-2024-10-06");
+        command.arg("+nightly-2025-01-02");
     }
     command.arg("run").arg("--quiet");
     if !features.is_empty() {