diff --git a/qfluentwidgets/__init__.py b/qfluentwidgets/__init__.py
index 34751c2c1204eb3a51b126555803e3cfb5cf88af..1176f982f6199038370aa815cf09a01343a577fe 100644
--- a/qfluentwidgets/__init__.py
+++ b/qfluentwidgets/__init__.py
@@ -12,7 +12,7 @@ Examples are available at https://github.com/zhiyiYo/PyQt-Fluent-Widgets/tree/ma
 :license: GPLv3, see LICENSE for more details.
 """
 
-__version__ = "0.7.1"
+__version__ = "0.7.2"
 
 from .components import *
 from .common import *
diff --git a/qfluentwidgets/components/date_time/picker_base.py b/qfluentwidgets/components/date_time/picker_base.py
index c59a457064ecf8613542615e10b7bf74ae1f6ae3..1ebbd6a933aaf75d763432ba504ade90cd121a09 100644
--- a/qfluentwidgets/components/date_time/picker_base.py
+++ b/qfluentwidgets/components/date_time/picker_base.py
@@ -239,7 +239,7 @@ class PickerBase(QPushButton):
     @checkColumnIndex
     def setColumnAlignment(self, index: int, align=Qt.AlignCenter):
         """ set the text alignment of specified column """
-        self.columns[index].setTextAlignment(align)
+        self.columns[index].setAlignment(align)
 
     @checkColumnIndex
     def setColumnWidth(self, index: int, width: int):
@@ -320,6 +320,7 @@ class PickerBase(QPushButton):
         """ clear columns """
         while self.columns:
             btn = self.columns.pop()
+            self.hBoxLayout.removeWidget(btn)
             btn.deleteLater()
 
     def enterEvent(self, e):
diff --git a/setup.py b/setup.py
index 14719c30c8b3ace8f2507619a30d314680ace05b..6fd40258f6b3ed9ce4f8651c42917ce2e2da0a7d 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@ with open('README.md', encoding='utf-8') as f:
 
 setuptools.setup(
     name="PyQt-Fluent-Widgets",
-    version="0.7.1",
+    version="0.7.2",
     keywords="pyqt fluent widgets",
     author="zhiyiYo",
     author_email="shokokawaii@outlook.com",