diff --git a/src/components/molecules/ManageableSidebar/styled.ts b/src/components/molecules/ManageableSidebar/styled.ts
index 4c811f5..e80e757 100644
--- a/src/components/molecules/ManageableSidebar/styled.ts
+++ b/src/components/molecules/ManageableSidebar/styled.ts
@@ -18,7 +18,7 @@ const Container = styled.div<TContainerProps>`
   direction: rtl;
   max-height: ${({ $maxHeight }) => $maxHeight || 'initial'};
   user-select: none;
-  border-top-right-radius: 12px;
+  border-top-right-radius: 7px;
 
   & ul {
     direction: ltr;
@@ -51,9 +51,9 @@ const Container = styled.div<TContainerProps>`
 
   /* corner radius */
 
-  && .ant-menu li:first-child div:first-child {
-    border-top-right-radius: 8px;
-  }
+  /* && .ant-menu li:first-child div:first-child {
+    border-top-right-radius: 4px;
+  } */
 
   /* selected header bgcolor */
 
diff --git a/src/components/organisms/Sidebar/styled.ts b/src/components/organisms/Sidebar/styled.ts
index 4d977e4..ff1f047 100644
--- a/src/components/organisms/Sidebar/styled.ts
+++ b/src/components/organisms/Sidebar/styled.ts
@@ -11,6 +11,7 @@ const BackgroundContainer = styled.div<TBackgroundContainerProps>`
   border-top-right-radius: ${({ $borderRadius }) => $borderRadius}px;
   border: 1px ${({ $borderColor }) => $borderColor} solid;
   border-left: 0;
+  box-sizing: border-box;
   width: 250px;
   height: calc(100vh - ${HEAD_FIRST_ROW}px);
 `