diff --git a/docs/getting-started/installation.md b/docs/getting-started/installation.md
index e567704..edba0f0 100644
--- a/docs/getting-started/installation.md
+++ b/docs/getting-started/installation.md
@@ -79,7 +79,7 @@ Development dependencies include:
 ```python
 import featcopilot
 print(featcopilot.__version__)
-# Output: 0.3.7
+# Output: 0.4.0
 
 from featcopilot import AutoFeatureEngineer
 print("Installation successful!")
diff --git a/docs/user-guide/cli.md b/docs/user-guide/cli.md
index ed68367..eecaa84 100644
--- a/docs/user-guide/cli.md
+++ b/docs/user-guide/cli.md
@@ -58,7 +58,7 @@ Sample (truncated) output:
 
 ```json
 {
-  "version": "0.3.7",
+  "version": "0.4.0",
   "supported_engines": ["llm", "relational", "tabular", "text", "timeseries"],
   "supported_selection_methods": [
     "chi2",
diff --git a/pyproject.toml b/pyproject.toml
index 583f2eb..340f8b6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "featcopilot"
-version = "0.3.7"
+version = "0.4.0"
 description = "Next-generation LLM-powered auto feature engineering framework with GitHub Copilot SDK"
 readme = "README.md"
 license = {text = "MIT"}