diff --git a/CHANGELOG.md b/CHANGELOG.md
index 650d8e5f7b..5e48e891f3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## [0.5.0](https://github.com/googleapis/genai-toolbox/compare/v0.4.0...v0.5.0) (2025-05-06)
+
+
+### Features
+
+* Add Couchbase as Source and Tool ([#307](https://github.com/googleapis/genai-toolbox/issues/307)) ([d7390b0](https://github.com/googleapis/genai-toolbox/commit/d7390b06b7bcb15411388e9a4dbcfe75afcca1ee))
+* Add postgres-execute-sql tool ([#490](https://github.com/googleapis/genai-toolbox/issues/490)) ([11ea7bc](https://github.com/googleapis/genai-toolbox/commit/11ea7bc584aa4ca8e8b0e7a355f6666ccbea2883))
+
+
 ## [0.4.0](https://github.com/googleapis/genai-toolbox/compare/v0.3.0...v0.4.0) (2025-04-23)
 
 
diff --git a/README.md b/README.md
index b9b8f95979..7654840ba5 100644
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@ To install Toolbox as a binary:
 <!-- {x-release-please-start-version} -->
 ```sh
 # see releases page for other versions
-export VERSION=0.4.0
+export VERSION=0.5.0
 curl -O https://storage.googleapis.com/genai-toolbox/v$VERSION/linux/amd64/toolbox
 chmod +x toolbox
 ```
@@ -94,7 +94,7 @@ You can also install Toolbox as a container:
 
 ```sh
 # see releases page for other versions
-export VERSION=0.4.0
+export VERSION=0.5.0
 docker pull us-central1-docker.pkg.dev/database-toolbox/toolbox/toolbox:$VERSION
 ```
 
@@ -107,7 +107,7 @@ To install from source, ensure you have the latest version of
 [Go installed](https://go.dev/doc/install), and then run the following command:
 
 ```sh
-go install github.com/googleapis/genai-toolbox@v0.4.0
+go install github.com/googleapis/genai-toolbox@v0.5.0
 ```
 <!-- {x-release-please-end} -->
 
diff --git a/cmd/version.txt b/cmd/version.txt
index 1d0ba9ea18..8f0916f768 100644
--- a/cmd/version.txt
+++ b/cmd/version.txt
@@ -1 +1 @@
-0.4.0
+0.5.0
diff --git a/docs/en/getting-started/introduction/_index.md b/docs/en/getting-started/introduction/_index.md
index 897ec90f5d..59993fbb00 100644
--- a/docs/en/getting-started/introduction/_index.md
+++ b/docs/en/getting-started/introduction/_index.md
@@ -57,7 +57,7 @@ To install Toolbox as a binary:
 
 ```sh
 # see releases page for other versions
-export VERSION=0.4.0
+export VERSION=0.5.0
 curl -O https://storage.googleapis.com/genai-toolbox/v$VERSION/linux/amd64/toolbox
 chmod +x toolbox
 ```
@@ -68,7 +68,7 @@ You can also install Toolbox as a container:
 
 ```sh
 # see releases page for other versions
-export VERSION=0.4.0
+export VERSION=0.5.0
 docker pull us-central1-docker.pkg.dev/database-toolbox/toolbox/toolbox:$VERSION
 ```
 
@@ -79,7 +79,7 @@ To install from source, ensure you have the latest version of
 [Go installed](https://go.dev/doc/install), and then run the following command:
 
 ```sh
-go install github.com/googleapis/genai-toolbox@v0.4.0
+go install github.com/googleapis/genai-toolbox@v0.5.0
 ```
 
 {{% /tab %}}
diff --git a/docs/en/getting-started/local_quickstart.md b/docs/en/getting-started/local_quickstart.md
index 777033cea0..114ed80edf 100644
--- a/docs/en/getting-started/local_quickstart.md
+++ b/docs/en/getting-started/local_quickstart.md
@@ -138,7 +138,7 @@ In this section, we will download Toolbox, configure our tools in a
     <!-- {x-release-please-start-version} -->
     ```bash
     export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-    curl -O https://storage.googleapis.com/genai-toolbox/v0.4.0/$OS/toolbox
+    curl -O https://storage.googleapis.com/genai-toolbox/v0.5.0/$OS/toolbox
     ```
     <!-- {x-release-please-end} -->
 
diff --git a/docs/en/getting-started/mcp_quickstart/_index.md b/docs/en/getting-started/mcp_quickstart/_index.md
index 37b3518018..d8ba9b5e6f 100644
--- a/docs/en/getting-started/mcp_quickstart/_index.md
+++ b/docs/en/getting-started/mcp_quickstart/_index.md
@@ -105,7 +105,7 @@ In this section, we will download Toolbox, configure our tools in a
     <!-- {x-release-please-start-version} -->
     ```bash
     export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-    curl -O https://storage.googleapis.com/genai-toolbox/v0.4.0/$OS/toolbox
+    curl -O https://storage.googleapis.com/genai-toolbox/v0.5.0/$OS/toolbox
     ```
     <!-- {x-release-please-end} -->
 
diff --git a/docs/en/samples/bigquery/local_quickstart.md b/docs/en/samples/bigquery/local_quickstart.md
index 5394cef01e..590c7993ab 100644
--- a/docs/en/samples/bigquery/local_quickstart.md
+++ b/docs/en/samples/bigquery/local_quickstart.md
@@ -132,7 +132,7 @@ In this section, we will download Toolbox, configure our tools in a `tools.yaml`
     <!-- {x-release-please-start-version} -->
     ```bash
     export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-    curl -O https://storage.googleapis.com/genai-toolbox/v0.4.0/$OS/toolbox
+    curl -O https://storage.googleapis.com/genai-toolbox/v0.5.0/$OS/toolbox
     ```
     <!-- {x-release-please-end} -->
 
diff --git a/docs/en/samples/bigquery/mcp_quickstart/_index.md b/docs/en/samples/bigquery/mcp_quickstart/_index.md
index 0700b5ae37..844b4deac3 100644
--- a/docs/en/samples/bigquery/mcp_quickstart/_index.md
+++ b/docs/en/samples/bigquery/mcp_quickstart/_index.md
@@ -84,7 +84,7 @@ In this section, we will download Toolbox, configure our tools in a `tools.yaml`
    <!-- {x-release-please-start-version} -->
    ```bash
    export OS="linux/amd64" # one of linux/amd64, darwin/arm64, darwin/amd64, or windows/amd64
-   curl -O https://storage.googleapis.com/genai-toolbox/v0.4.0/$OS/toolbox
+   curl -O https://storage.googleapis.com/genai-toolbox/v0.5.0/$OS/toolbox
    ```
    <!-- {x-release-please-end} -->