diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 92d1bd20531..72ee57fbf92 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -16,11 +16,11 @@ jobs:
         os: [macos-latest, ubuntu-latest, windows-latest]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: gradle/actions/wrapper-validation@v4
 
       - name: Set up JDK ${{ matrix.java }}
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
           java-version: ${{ matrix.java }}
           distribution: 'corretto'
@@ -38,15 +38,15 @@ jobs:
         os: [ubuntu-latest]
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: gradle/actions/wrapper-validation@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v5
         with:
           node-version: 18
           cache: "yarn"
 
       - name: Set up JDK ${{ matrix.java }}
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
           java-version: ${{ matrix.java }}
           distribution: 'corretto'
@@ -67,8 +67,8 @@ jobs:
     runs-on: ubuntu-latest
     name: TypeScript Lint
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v5
         with:
           node-version: 18
           cache: "yarn"
@@ -87,14 +87,14 @@ jobs:
         node: [18, 20, 22]
 
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v5
         with:
           node-version: ${{ matrix.node }}
           cache: "yarn"
       - uses: gradle/actions/wrapper-validation@v4
       - name: Set up JDK 17
-        uses: actions/setup-java@v4
+        uses: actions/setup-java@v5
         with:
           java-version: '17'
           distribution: 'corretto'
@@ -116,8 +116,8 @@ jobs:
     runs-on: smithy-typescript_ubuntu-latest_8-core
     name: Extract Docs
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v5
         with:
           node-version: 18
           cache: "yarn"
@@ -134,8 +134,8 @@ jobs:
     runs-on: ubuntu-latest
     name: Ensure TypeScript is formatted
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v5
         with:
           node-version: 18
           cache: "yarn"
@@ -154,12 +154,12 @@ jobs:
     runs-on: ubuntu-latest
     name: Ensure TypeScript packages have changesets
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         # Include full git history needed for `yarn changeset status`
         with:
           ref: ${{github.event.pull_request.head.sha}}
           fetch-depth: 0
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v5
         with:
           node-version: 18
           cache: "yarn"
diff --git a/.github/workflows/release-npm-packages.yml b/.github/workflows/release-npm-packages.yml
index 0e91c17aa0e..1b3084f365d 100644
--- a/.github/workflows/release-npm-packages.yml
+++ b/.github/workflows/release-npm-packages.yml
@@ -11,10 +11,10 @@ jobs:
       id-token: write
       contents: write
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           token: ${{secrets.PR_TOKEN}}
-      - uses: actions/setup-node@v4
+      - uses: actions/setup-node@v5
         with:
           node-version: 18
           cache: "yarn"
diff --git a/.github/workflows/release-npm-ssdk-libs.yml b/.github/workflows/release-npm-ssdk-libs.yml
index 8465ecd0d49..8eb45a266dd 100644
--- a/.github/workflows/release-npm-ssdk-libs.yml
+++ b/.github/workflows/release-npm-ssdk-libs.yml
@@ -11,8 +11,8 @@ jobs:
       id-token: write
       contents: write
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-node@v4
+      - uses: actions/checkout@v5
+      - uses: actions/setup-node@v5
         with:
           node-version: 18
           cache: "yarn"
diff --git a/.github/workflows/update-smithy-gradle-plugin.yml b/.github/workflows/update-smithy-gradle-plugin.yml
index e01e6d7e733..46e34d0da01 100644
--- a/.github/workflows/update-smithy-gradle-plugin.yml
+++ b/.github/workflows/update-smithy-gradle-plugin.yml
@@ -10,7 +10,7 @@ jobs:
   get-version:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Fetch latest smithy-gradle-plugin version
         id: fetch-latest