diff --git a/poetry.lock b/poetry.lock
index 673389d..ec180b1 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -238,7 +238,7 @@ toml = ["tomli"]
 name = "dataclasses"
 version = "0.8"
 description = "A backport of the dataclasses module for Python 3.6"
-category = "main"
+category = "dev"
 optional = false
 python-versions = ">=3.6, <3.7"
 
@@ -1126,9 +1126,6 @@ category = "main"
 optional = true
 python-versions = ">=3.6"
 
-[package.dependencies]
-dataclasses = {version = "*", markers = "python_version < \"3.7\""}
-
 [package.extras]
 watchdog = ["watchdog"]
 
@@ -1141,7 +1138,6 @@ optional = true
 python-versions = ">=3.6.1"
 
 [package.dependencies]
-dataclasses = {version = "*", markers = "python_version < \"3.7\""}
 h11 = ">=0.8.1"
 
 [[package]]
diff --git a/pyproject.toml b/pyproject.toml
index 27c35a7..ac7d02e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "gino"
-version = "1.1.0-beta.2"
+version = "1.1.0-rc.1"
 description = "GINO Is Not ORM - a Python asyncio ORM on SQLAlchemy core."
 license = "BSD-3-Clause"
 authors = ["Fantix King <fantix.king@gmail.com>"]