diff --git a/.github/.release-please-manifest.json b/.github/.release-please-manifest.json
new file mode 100644
index 0000000..5ceda3a
--- /dev/null
+++ b/.github/.release-please-manifest.json
@@ -0,0 +1,3 @@
+{
+  ".": "5.1.2"
+}
diff --git a/.github/release-please-config.json b/.github/release-please-config.json
new file mode 100644
index 0000000..ddd592f
--- /dev/null
+++ b/.github/release-please-config.json
@@ -0,0 +1,21 @@
+{
+  "$schema": "https://raw.githubusercontent.com/googleapis/release-please/main/schemas/config.json",
+  "packages": {
+    ".": {
+      "release-type": "php",
+      "package-name": "solapi/sdk",
+      "include-component-in-tag": false,
+      "include-v-in-tag": true,
+      "tag-separator": "",
+      "draft": false,
+      "prerelease": false,
+      "changelog-path": "CHANGELOG.md",
+      "extra-files": [
+        {
+          "type": "generic",
+          "path": "src/Models/Request/DefaultAgent.php"
+        }
+      ]
+    }
+  }
+}
diff --git a/.github/workflows/release-please.yml b/.github/workflows/release-please.yml
new file mode 100644
index 0000000..58c0cd9
--- /dev/null
+++ b/.github/workflows/release-please.yml
@@ -0,0 +1,21 @@
+name: release-please
+
+on:
+  push:
+    branches:
+      - master
+
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  release-please:
+    name: Run release-please
+    runs-on: ubuntu-latest
+    steps:
+      - name: Run release-please
+        uses: googleapis/release-please-action@v4
+        with:
+          config-file: .github/release-please-config.json
+          manifest-file: .github/.release-please-manifest.json
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
deleted file mode 100644
index a429c31..0000000
--- a/.github/workflows/release.yml
+++ /dev/null
@@ -1,97 +0,0 @@
-name: Release
-
-on:
-  workflow_run:
-    workflows: ["CI"]
-    types: [completed]
-    branches: [master]
-
-permissions:
-  contents: write
-  pull-requests: read
-
-jobs:
-  release:
-    name: Tag & GitHub Release
-    runs-on: ubuntu-latest
-    if: >
-      github.event.workflow_run.conclusion == 'success' &&
-      github.event.workflow_run.head_branch == 'master' &&
-      github.event.workflow_run.event == 'push'
-
-    steps:
-      - name: Checkout CI head commit
-        uses: actions/checkout@v4
-        with:
-          ref: ${{ github.event.workflow_run.head_sha }}
-          fetch-depth: 0
-
-      - name: Extract version from composer.json
-        id: version
-        run: |
-          set -euo pipefail
-          VERSION=$(jq -r '.version' composer.json)
-          if ! [[ "$VERSION" =~ ^[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-            echo "::error::composer.json version '$VERSION' is not a plain semver (X.Y.Z). Pre-release tags are not supported by this workflow."
-            exit 1
-          fi
-          echo "version=$VERSION" >> "$GITHUB_OUTPUT"
-          echo "tag=v$VERSION" >> "$GITHUB_OUTPUT"
-          echo "Detected version: $VERSION"
-
-      - name: Verify DefaultAgent.php version matches composer.json
-        env:
-          VERSION: ${{ steps.version.outputs.version }}
-        run: |
-          set -euo pipefail
-          AGENT_FILE="src/Models/Request/DefaultAgent.php"
-          AGENT_VERSION=$(grep -oE "php/[0-9]+\.[0-9]+\.[0-9]+" "$AGENT_FILE" | head -n1 | sed 's|php/||')
-          if [ -z "$AGENT_VERSION" ]; then
-            echo "::error file=$AGENT_FILE::Could not locate 'php/X.Y.Z' SDK version literal in $AGENT_FILE."
-            exit 1
-          fi
-          if [ "$VERSION" != "$AGENT_VERSION" ]; then
-            echo "::error file=$AGENT_FILE::Version drift detected. composer.json='$VERSION' but $AGENT_FILE='$AGENT_VERSION'. Update both files to the same value."
-            exit 1
-          fi
-          echo "Version drift check passed: $VERSION"
-
-      - name: Check whether tag already exists
-        id: tag-check
-        env:
-          TAG: ${{ steps.version.outputs.tag }}
-        run: |
-          set -euo pipefail
-          git fetch --tags --quiet
-          if git rev-parse -q --verify "refs/tags/${TAG}" >/dev/null; then
-            echo "exists=true" >> "$GITHUB_OUTPUT"
-            echo "Tag ${TAG} already exists — nothing to release. Skipping."
-          else
-            echo "exists=false" >> "$GITHUB_OUTPUT"
-            echo "Tag ${TAG} does not exist — proceeding with release."
-          fi
-
-      - name: Configure git identity
-        if: steps.tag-check.outputs.exists == 'false'
-        run: |
-          git config user.name "github-actions[bot]"
-          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-
-      - name: Create and push tag
-        if: steps.tag-check.outputs.exists == 'false'
-        env:
-          TAG: ${{ steps.version.outputs.tag }}
-        run: |
-          set -euo pipefail
-          git tag -a "$TAG" -m "Release $TAG"
-          git push origin "$TAG"
-
-      - name: Create GitHub Release
-        if: steps.tag-check.outputs.exists == 'false'
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          TAG: ${{ steps.version.outputs.tag }}
-        run: |
-          gh release create "$TAG" \
-            --title "$TAG" \
-            --generate-notes
diff --git a/src/Models/Request/DefaultAgent.php b/src/Models/Request/DefaultAgent.php
index 69f7871..5727a21 100644
--- a/src/Models/Request/DefaultAgent.php
+++ b/src/Models/Request/DefaultAgent.php
@@ -16,7 +16,7 @@ class DefaultAgent
 
     public function __construct()
     {
-        $this->sdkVersion = 'php/5.1.2';
+        $this->sdkVersion = 'php/5.1.2'; // x-release-please-version
         $this->osPlatform = PHP_OS . " | " . phpversion();
     }
 }