diff --git a/docs/misc/changelog.rst b/docs/misc/changelog.rst
index f6e6b4a..ffb6773 100644
--- a/docs/misc/changelog.rst
+++ b/docs/misc/changelog.rst
@@ -4,7 +4,7 @@ Changelog
 ==========
 
 
-Release 1.7.0a5 (WIP)
+Release 1.7.0a6 (WIP)
 --------------------------
 
 Breaking Changes:
diff --git a/stable_baselines3/__init__.py b/stable_baselines3/__init__.py
index e1606bd..680e254 100644
--- a/stable_baselines3/__init__.py
+++ b/stable_baselines3/__init__.py
@@ -13,7 +13,7 @@ from stable_baselines3.td3 import TD3
 
 # Small monkey patch so gym 0.21 is compatible with numpy >= 1.24
 # TODO: remove when upgrading to gym 0.26
-np.bool = bool
+np.bool = bool  # type: ignore[attr-defined]
 
 # Read version from file
 version_file = os.path.join(os.path.dirname(__file__), "version.txt")
diff --git a/stable_baselines3/version.txt b/stable_baselines3/version.txt
index 5d819d4..21392a8 100644
--- a/stable_baselines3/version.txt
+++ b/stable_baselines3/version.txt
@@ -1 +1 @@
-1.7.0a5
+1.7.0a6