diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 171b109..600835d 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-    ".": "0.4.4"
+    ".": "0.5.0"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 910268a..373a92a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [0.5.0](https://github.com/b-long/opentdf-python-sdk/compare/otdf-python-v0.4.4...otdf-python-v0.5.0) (2026-05-08)
+
+
+### Features
+
+* **main:** update proto GIT_TAG to service/v0.8.0 ([#137](https://github.com/b-long/opentdf-python-sdk/issues/137)) ([05ea9a4](https://github.com/b-long/opentdf-python-sdk/commit/05ea9a4c2dcf23d2a709e421802f45ddb89d2ace))
+
 ## [0.4.4](https://github.com/b-long/opentdf-python-sdk/compare/otdf-python-v0.4.3...otdf-python-v0.4.4) (2026-04-30)
 
 
diff --git a/otdf-python-proto/pyproject.toml b/otdf-python-proto/pyproject.toml
index 146c2a6..e1d4e6a 100644
--- a/otdf-python-proto/pyproject.toml
+++ b/otdf-python-proto/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "otdf-python-proto"
-version = "0.4.4"
+version = "0.5.0"
 description = "Generated protobuf files for OpenTDF Python SDK"
 readme = "README.md"
 authors = [
diff --git a/otdf-python-proto/uv.lock b/otdf-python-proto/uv.lock
index 5c5daa4..d0e9ca5 100644
--- a/otdf-python-proto/uv.lock
+++ b/otdf-python-proto/uv.lock
@@ -221,7 +221,7 @@ wheels = [
 
 [[package]]
 name = "otdf-python-proto"
-version = "0.4.4"
+version = "0.5.0"
 source = { editable = "." }
 dependencies = [
     { name = "connect-python" },
diff --git a/pyproject.toml b/pyproject.toml
index b7911a3..4f86993 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "otdf-python"
-version = "0.4.4"
+version = "0.5.0"
 description = "Unofficial OpenTDF SDK for Python"
 readme = "README.md"
 authors = [
diff --git a/uv.lock b/uv.lock
index 6fec279..52950f5 100644
--- a/uv.lock
+++ b/uv.lock
@@ -417,7 +417,7 @@ wheels = [
 
 [[package]]
 name = "otdf-python"
-version = "0.4.4"
+version = "0.5.0"
 source = { editable = "." }
 dependencies = [
     { name = "connect-python" },