diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 3576200..876e57f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -25,7 +25,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -53,7 +53,7 @@ jobs:
         with:
           components: clippy
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -74,7 +74,7 @@ jobs:
         with:
           components: rustfmt
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -107,7 +107,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -131,7 +131,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@nightly
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -184,7 +184,7 @@ jobs:
       # (No space left on device). Version-keying means a Cargo.lock change no
       # longer triggers the rebuild; the cached binary is reused.
       - name: Cache rivet-cli binary
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: ~/.cargo/bin/rivet
           key: ${{ runner.os }}-rivet-cli-v0.22.0
@@ -258,7 +258,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -291,7 +291,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -325,7 +325,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -362,7 +362,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -400,7 +400,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -440,7 +440,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -479,7 +479,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -518,7 +518,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -556,7 +556,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
@@ -594,7 +594,7 @@ jobs:
       - uses: actions/checkout@v7
       - uses: dtolnay/rust-toolchain@stable
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
diff --git a/.github/workflows/fuzz-smoke.yml b/.github/workflows/fuzz-smoke.yml
index 278dc6d..ceb9df9 100644
--- a/.github/workflows/fuzz-smoke.yml
+++ b/.github/workflows/fuzz-smoke.yml
@@ -79,7 +79,7 @@ jobs:
       - name: Install nightly Rust
         uses: dtolnay/rust-toolchain@nightly
 
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry
diff --git a/.github/workflows/signing-e2e.yml b/.github/workflows/signing-e2e.yml
index 9f6b567..d026a7f 100644
--- a/.github/workflows/signing-e2e.yml
+++ b/.github/workflows/signing-e2e.yml
@@ -95,7 +95,7 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
 
       - name: Cache Cargo dependencies
-        uses: actions/cache@v5
+        uses: actions/cache@v6
         with:
           path: |
             ~/.cargo/registry