diff --git a/pyproject.toml b/pyproject.toml
index dbad900..f759f35 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "arbiter"
-version = "0.3.0"
+version = "0.4.0"
 description = "A multi-agent code review system that shows its work"
 readme = "readme.md"
 requires-python = ">=3.12"
@@ -35,6 +35,9 @@ dependencies = [
     "arq>=0.25.0",
     "redis>=5.0.1",
     "prometheus-client>=0.19.0",
+    # Phase 4: Platform Integrations
+    "httpx>=0.26.0",
+    "tenacity>=8.2.0",
 ]
 
 [project.optional-dependencies]
@@ -45,9 +48,9 @@ dev = [
     "ruff>=0.4.0",
     "mypy>=1.10.0",
     "types-PyYAML>=6.0.0",
-    "httpx>=0.26.0",
     "fakeredis>=2.21.0",
     "aiosqlite>=0.19.0",
+    "respx>=0.21.0",
 ]
 
 [project.scripts]